<s>
The	O
Media	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
(	O
MTP	O
)	O
is	O
an	O
extension	O
to	O
the	O
Picture	B-Algorithm
Transfer	I-Algorithm
Protocol	I-Algorithm
(	O
PTP	O
)	O
communications	O
protocol	O
that	O
allows	O
media	O
files	B-Operating_System
to	O
be	O
transferred	O
automatically	O
to	O
and	O
from	O
portable	B-Application
devices	I-Application
.	O
</s>
<s>
Whereas	O
PTP	O
was	O
designed	O
for	O
downloading	O
photographs	O
from	O
digital	B-Device
cameras	I-Device
,	O
Media	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
allows	O
the	O
transfer	O
of	O
music	O
files	B-Operating_System
on	O
digital	O
audio	O
players	O
and	O
media	O
files	B-Operating_System
on	O
portable	O
media	B-Device
players	I-Device
,	O
as	O
well	O
as	O
personal	O
information	O
on	O
personal	B-Application
digital	I-Application
assistants	I-Application
.	O
</s>
<s>
MTP	O
is	O
a	O
key	O
part	O
of	O
WMDRM10-PD	O
,	O
a	O
digital	O
rights	O
management	O
(	O
DRM	O
)	O
service	O
for	O
the	O
Windows	B-Device
Media	I-Device
platform	O
.	O
</s>
<s>
In	O
2011	O
,	O
it	O
became	O
the	O
standard	O
method	O
to	O
transfer	O
files	B-Operating_System
to	O
and	O
from	O
Android	B-Application
.	O
</s>
<s>
MTP	O
is	O
part	O
of	O
the	O
"	O
Windows	B-Device
Media	I-Device
"	O
framework	O
and	O
thus	O
closely	O
related	O
to	O
Windows	B-Device
Media	I-Device
Player	I-Device
.	O
</s>
<s>
Versions	O
of	O
the	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
system	I-Application
from	O
Windows	B-Application
XP	I-Application
SP2	O
support	O
MTP	O
.	O
</s>
<s>
Windows	B-Application
XP	I-Application
requires	O
Windows	B-Device
Media	I-Device
Player	I-Device
10	I-Device
or	O
higher	O
;	O
later	O
Windows	O
versions	O
have	O
built-in	O
support	O
.	O
</s>
<s>
Microsoft	O
has	O
made	O
an	O
MTP	O
Porting	O
Kit	O
available	O
for	O
older	O
versions	O
of	O
Windows	O
back	O
to	O
Windows	B-Device
98	I-Device
.	O
</s>
<s>
The	O
USB	B-Protocol
Implementers	O
Forum	O
device	O
working	O
group	O
standardized	O
MTP	O
as	O
a	O
full-fledged	O
Universal	B-Protocol
Serial	I-Protocol
Bus	I-Protocol
(	O
USB	B-Protocol
)	O
device	O
class	O
in	O
May	O
2008	O
.	O
</s>
<s>
The	O
main	O
purpose	O
of	O
this	O
protocol	O
is	O
to	O
allow	O
only	O
the	O
transfer	O
of	O
media	O
files	B-Operating_System
and	O
associated	O
metadata	O
to	O
and	O
from	O
portable	B-Application
devices	I-Application
,	O
one	O
transfer	O
function	O
,	O
in	O
or	O
out	O
,	O
at	O
a	O
time	O
.	O
</s>
<s>
A	O
workaround	B-Application
is	O
to	O
copy	O
to	O
the	O
hosting	O
system	O
for	O
these	O
operations	O
and	O
then	O
copy	O
back	O
.	O
</s>
<s>
A	O
battery-powered	O
mobile	B-Application
device	I-Application
can	O
report	O
its	O
battery	O
charge	O
level	O
through	O
MTP	O
.	O
</s>
<s>
The	O
protocol	O
was	O
originally	O
implemented	O
for	O
use	O
across	O
USB	B-Protocol
but	O
extended	O
for	O
use	O
across	O
TCP/IP	B-Protocol
and	O
Bluetooth	B-Protocol
.	O
</s>
<s>
Windows	B-Application
Vista	I-Application
supports	O
MTP	O
over	O
TCP/IP	B-Protocol
.	O
</s>
<s>
Windows	B-Device
7	I-Device
and	O
Windows	B-Application
Vista	I-Application
with	O
the	O
Platform	O
Update	O
for	O
Windows	B-Application
Vista	I-Application
also	O
support	O
MTP	O
over	O
Bluetooth	B-Protocol
.	O
</s>
<s>
A	O
main	O
reason	O
for	O
using	O
MTP	O
rather	O
than	O
,	O
for	O
example	O
,	O
the	O
USB	B-Architecture
mass-storage	I-Architecture
device	I-Architecture
class	I-Architecture
(	O
MSC	O
)	O
is	O
that	O
the	O
latter	O
operates	O
at	O
the	O
level	O
of	O
mass	O
storage	O
device	O
blocks	O
,	O
rather	O
than	O
at	O
the	O
level	O
of	O
files	B-Operating_System
,	O
or	O
blocks	O
within	O
files	B-Operating_System
,	O
in	O
a	O
file	B-Application
system	I-Application
.	O
</s>
<s>
In	O
other	O
words	O
,	O
the	O
USB	B-Architecture
mass	I-Architecture
storage	I-Architecture
class	O
is	O
designed	O
to	O
give	O
a	O
host	O
computer	O
undifferentiated	O
access	O
to	O
bulk	O
mass	O
storage	O
,	O
such	O
as	O
compact	B-Device
flash	I-Device
,	O
rather	O
than	O
to	O
a	O
file	B-Application
system	I-Application
,	O
which	O
might	O
be	O
safely	O
shared	O
with	O
the	O
target	O
device	O
(	O
except	O
for	O
specific	O
files	B-Operating_System
which	O
the	O
host	O
might	O
be	O
modifying/accessing	O
)	O
.	O
</s>
<s>
In	O
practice	O
,	O
therefore	O
,	O
when	O
a	O
USB	B-Protocol
host	O
computer	O
has	O
mounted	O
an	O
MSC	O
partition	B-Application
,	O
it	O
assumes	O
absolute	O
control	O
of	O
the	O
storage	O
,	O
which	O
then	O
may	O
not	O
be	O
safely	O
modified	O
by	O
the	O
device	O
without	O
risk	O
of	O
data	O
corruption	O
until	O
the	O
host	O
computer	O
has	O
severed	O
the	O
connection	O
.	O
</s>
<s>
Furthermore	O
,	O
because	O
the	O
host	O
computer	O
has	O
full	O
control	O
over	O
the	O
connected	O
storage	O
device	O
,	O
there	O
is	O
a	O
risk	O
that	O
the	O
host	O
computer	O
may	O
corrupt	O
the	O
file	B-Application
system	I-Application
,	O
reformat	O
it	O
to	O
a	O
file	B-Application
system	I-Application
not	O
supported	O
by	O
the	O
USB	B-Protocol
device	O
,	O
or	O
otherwise	O
modify	O
it	O
in	O
such	O
a	O
way	O
that	O
the	O
USB	B-Protocol
device	O
cannot	O
completely	O
understand	O
it	O
.	O
</s>
<s>
In	O
this	O
way	O
,	O
MTP	O
works	O
like	O
a	O
transactional	O
file	B-Application
system	I-Application
-	O
either	O
the	O
entire	O
file	O
is	O
written/read	O
or	O
nothing	O
.	O
</s>
<s>
In	O
particular	O
,	O
MTP	O
Initiators	O
may	O
have	O
to	O
provide	O
passwords	O
and	O
other	O
information	O
to	O
unlock	O
files	B-Operating_System
,	O
or	O
otherwise	O
enable	O
digital	O
rights	O
management	O
.	O
</s>
<s>
MTPZ	O
,	O
the	O
Zune	O
Extension	O
to	O
MTP	O
specifically	O
denies	O
access	O
to	O
files	B-Operating_System
until	O
authentication	O
has	O
been	O
processed	O
,	O
which	O
is	O
only	O
possible	O
using	O
Windows	B-Device
Media	I-Device
Player	I-Device
10	I-Device
or	O
higher	O
.	O
</s>
<s>
By	O
not	B-Architecture
exposing	I-Architecture
the	O
filesystem	B-Application
and	O
metadata	O
index	O
,	O
the	O
integrity	O
of	O
these	O
is	O
in	O
full	O
control	O
of	O
the	O
device	O
.	O
</s>
<s>
( +	O
)	O
No	O
risk	O
of	O
file	B-Application
system	I-Application
corruption	O
if	O
unplugging	O
the	O
device	O
while	O
writing	O
.	O
</s>
<s>
File	O
transfers	O
are	O
atomic	O
,	O
meaning	O
completed	O
in	O
a	O
single	O
operation	O
,	O
and	O
no	O
explicit	O
file	B-Application
system	I-Application
unmounting	O
(	O
"	O
safe	O
removal	O
"	O
)	O
is	O
required	O
by	O
the	O
user	O
,	O
since	O
the	O
file	B-Application
system	I-Application
remains	O
managed	O
by	O
the	O
mobile	B-Application
device	I-Application
's	O
operating	B-General_Concept
system	I-General_Concept
,	O
and	O
a	O
mobile	B-Application
device	I-Application
is	O
battery-powered	O
,	O
meaning	O
power	O
to	O
the	O
flash	O
memory	O
is	O
not	O
cut	O
out	O
unexpectedly	O
.	O
</s>
<s>
The	O
device	O
can	O
access	O
its	O
own	O
file	B-Application
system	I-Application
while	O
connected	O
:	O
</s>
<s>
( +	O
)	O
A	O
separate	O
file	B-Application
system	I-Application
for	O
host	O
exposure	O
is	O
unnecessary	O
.	O
</s>
<s>
This	O
avoids	O
the	O
inflexibility	O
of	O
setting	O
aside	O
a	O
fixed-size	O
partition	B-Application
for	O
this	O
file	B-Application
system	I-Application
.	O
</s>
<s>
( +	O
)	O
File	B-Application
system	I-Application
support	O
:	O
The	O
host	O
does	O
not	O
need	O
to	O
support	O
the	O
file	B-Application
system	I-Application
of	O
the	O
device	O
.	O
</s>
<s>
Conversely	O
,	O
the	O
device	O
manufacturer	O
is	O
free	O
to	O
choose	O
a	O
file	B-Application
system	I-Application
(	O
usually	O
a	O
Linux	B-Application
filesystem	B-Application
unsupported	O
by	O
Windows	O
)	O
other	O
than	O
the	O
widely	O
supported	O
FAT	B-Application
family	O
of	O
filesystems	B-Application
.	O
</s>
<s>
(	O
-	O
)	O
Undeletion	O
:	O
Filesystem	B-Application
recovery	O
and	O
undeletion	O
tools	O
on	O
the	O
computer	O
cannot	O
be	O
used	O
,	O
since	O
MTP	O
is	O
an	O
abstraction	B-Architecture
layer	I-Architecture
that	O
offers	O
no	O
block-level	B-General_Concept
access	O
.	O
</s>
<s>
(	O
-	O
)	O
Missing	O
time	O
stamps	O
:	O
Many	O
MTP-attached	O
devices	O
,	O
particularly	O
older	O
ones	O
,	O
do	O
not	O
report	O
file	O
timestamps	O
via	O
the	O
protocol	O
,	O
causing	O
them	O
to	O
be	O
lost	O
when	O
files	B-Operating_System
are	O
copied/moved	O
to	O
or	O
from	O
a	O
computer	O
.	O
</s>
<s>
Some	O
file	O
formats	O
still	O
store	O
timestamps	O
internally	O
,	O
such	O
as	O
JPEG	O
photos	O
with	O
embedded	O
Exif	O
meta	O
data	O
,	O
but	O
the	O
date	O
and	O
time	O
information	O
of	O
files	B-Operating_System
without	O
such	O
internal	O
metadata	O
would	O
be	O
lost	O
.	O
</s>
<s>
(	O
-	O
)	O
Mislocation	O
:	O
Users	O
have	O
reported	O
files	B-Operating_System
occasionally	O
showing	O
up	O
in	O
incorrect	O
locations	O
as	O
a	O
result	O
of	O
poor	O
communication	O
between	O
the	O
MTP	O
host	O
(	O
e.g.	O
</s>
<s>
computer	B-Operating_System
file	I-Operating_System
manager	O
)	O
.	O
</s>
<s>
Should	O
a	O
directory	O
be	O
moved	O
away	O
from	O
the	O
MTP	O
host	O
without	O
the	O
client	O
detecting	O
all	O
files	B-Operating_System
,	O
undetected	O
files	B-Operating_System
could	O
end	O
up	O
deleted	O
without	O
all	O
files	B-Operating_System
having	O
been	O
transferred	O
successfully	O
.	O
</s>
<s>
Unlike	O
USB	B-Architecture
mass	I-Architecture
storage	I-Architecture
,	O
where	O
the	O
host	O
operating	B-General_Concept
system	I-General_Concept
is	O
free	O
to	O
multiplex	O
block	O
transfers	O
,	O
and	O
logical	O
operations	O
are	O
an	O
emergent	O
phenomenon	O
,	O
the	O
operations	O
supported	O
by	O
MTP	O
are	O
more	O
coarse-grained	O
,	O
such	O
as	O
transferring	O
entire	O
files	B-Operating_System
.	O
</s>
<s>
Neither	O
protocol	O
is	O
parallel	O
or	O
asynchronous	O
by	O
itself	O
(	O
aside	O
from	O
the	O
UAS	O
extension	O
of	O
USB	B-Architecture
mass	I-Architecture
storage	I-Architecture
,	O
which	O
adds	O
multiple	O
command	O
queues	O
)	O
.	O
</s>
<s>
(	O
-	O
)	O
Limited	O
support	O
for	O
transferring	O
parts	O
of	O
files	B-Operating_System
,	O
such	O
as	O
blocks	O
or	O
byte	O
ranges	O
(	O
see	O
)	O
.	O
</s>
<s>
(	O
-	O
)	O
Limited	O
support	O
for	O
direct	O
modification	O
of	O
files	B-Operating_System
(	O
see	O
)	O
.	O
</s>
<s>
Google	B-Application
's	I-Application
MTP	O
implementation	O
in	O
Android	B-Application
includes	O
extensions	O
to	O
deal	O
with	O
this	O
limitation	O
;	O
however	O
,	O
these	O
extensions	O
must	O
be	O
supported	O
by	O
the	O
host	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
This	O
could	O
cause	O
"	O
preparing	O
"	O
for	O
transferring	O
files	B-Operating_System
from	O
highly	O
populated	O
directories	O
to	O
take	O
longer	O
than	O
the	O
file	O
transfer	O
itself	O
,	O
since	O
the	O
file	O
manager	O
needs	O
to	O
generate	O
a	O
list	O
of	O
paths	O
to	O
files	B-Operating_System
it	O
is	O
about	O
to	O
transfer	O
,	O
which	O
requires	O
accessing	O
the	O
slow	O
directory	O
listings	O
.	O
</s>
<s>
(	O
-	O
)	O
Windows	O
does	O
not	O
assign	O
drive	O
letters	O
or	O
UNC	O
paths	O
to	O
MTP	O
devices	O
because	O
it	O
does	O
not	O
natively	O
expose	O
them	O
as	O
virtual	B-Application
file	I-Application
systems	I-Application
.	O
</s>
<s>
Without	O
drive	O
letters	O
or	O
UNC	O
paths	O
,	O
MTP-unaware	O
software	O
cannot	O
access	O
directories	O
or	O
files	B-Operating_System
on	O
these	O
devices	O
.	O
</s>
<s>
The	O
user	O
has	O
to	O
switch	O
to	O
an	O
MTP-aware	O
application	O
,	O
or	O
else	O
work	B-Application
around	I-Application
by	O
using	O
an	O
MTP-aware	O
application	O
such	O
as	O
Windows	B-Protocol
Explorer	I-Protocol
to	O
copy	O
or	O
move	O
the	O
file	O
to	O
a	O
file	B-Application
system	I-Application
that	O
the	O
application	O
can	O
access	O
.	O
</s>
<s>
One	O
specific	O
concern	O
is	O
that	O
antivirus	B-Application
software	I-Application
on	O
the	O
host	O
computer	O
may	O
not	O
be	O
aware	O
of	O
MTP	O
devices	O
,	O
making	O
them	O
potentially	O
less	O
secure	O
than	O
mass	O
storage	O
devices	O
(	O
although	O
if	O
files	B-Operating_System
on	O
MTP	O
devices	O
are	O
copied	O
or	O
moved	O
to	O
the	O
host	O
before	O
use	O
,	O
MTP-unaware	O
antivirus	B-Application
software	I-Application
will	O
have	O
a	O
chance	O
to	O
scan	O
them	O
)	O
.	O
</s>
<s>
Antivirus	B-Application
scanning	O
might	O
also	O
be	O
impractical	O
due	O
to	O
blocking	O
regular	O
use	O
of	O
the	O
device	O
.	O
</s>
<s>
(	O
-	O
)	O
Despite	O
identifiability	O
by	O
the	O
PTP/MTP	O
USB	B-Protocol
device	O
class	O
,	O
libmtp	O
documentation	O
indicates	O
that	O
the	O
vendor	O
and	O
product	O
ID	O
combination	O
plays	O
a	O
functional	O
role	O
in	O
identifying	O
an	O
MTP	O
device	O
,	O
also	O
by	O
Windows	O
drivers	O
.	O
</s>
<s>
Libmtp	O
includes	O
vast	O
listings	O
of	O
vendor	O
and	O
product	O
ID	O
numbers	O
of	O
devices	O
that	O
it	O
supports	O
,	O
along	O
with	O
workarounds	B-Application
for	O
bugs	O
.	O
</s>
<s>
This	O
non-generic	O
methodology	O
hinders	O
MTP	O
drivers	O
 '	O
forward	B-General_Concept
compatibility	I-General_Concept
with	O
new	O
devices	O
.	O
</s>
<s>
The	O
MTP	O
specification	O
includes	O
an	O
enumeration	B-Language
of	O
file	O
formats	O
,	O
called	O
object	O
format	O
.	O
</s>
<s>
The	O
use	O
of	O
this	O
enumeration	B-Language
is	O
in	O
communicating	O
supported	O
file	O
formats	O
,	O
and	O
formats	O
of	O
transferred	O
files	B-Operating_System
.	O
</s>
<s>
Jolla	B-Operating_System
cited	O
lack	O
of	O
WebM	B-Application
support	O
in	O
MTP	O
as	O
one	O
reason	O
not	O
to	O
support	O
the	O
video	O
format	O
in	O
their	O
mobile	O
operating	B-General_Concept
system	I-General_Concept
Sailfish	B-Operating_System
OS	I-Operating_System
.	O
</s>
<s>
It	O
is	O
unclear	O
if	O
the	O
limitation	O
is	O
in	O
the	O
tools	O
or	O
the	O
spec	O
,	O
other	O
than	O
that	O
WebM	B-Application
is	O
not	O
defined	O
by	O
the	O
MTP	O
1.1	O
spec	O
.	O
</s>
<s>
According	O
to	O
go-mtpfs	O
:	O
</s>
<s>
MTP	O
is	O
supported	O
in	O
Windows	B-Application
XP	I-Application
if	O
Windows	B-Device
Media	I-Device
Player	I-Device
10	I-Device
or	O
later	O
versions	O
are	O
installed	O
.	O
</s>
<s>
Windows	B-Application
Vista	I-Application
and	O
later	O
have	O
MTP	O
support	O
built	O
in	O
.	O
</s>
<s>
For	O
older	O
versions	O
of	O
Windows	O
,	O
specifically	O
,	O
Windows	O
2000	O
,	O
Windows	B-Device
98	I-Device
and	O
Windows	O
Me	O
,	O
Microsoft	O
has	O
released	O
the	O
MTP	O
Porting	O
Kit	O
.	O
</s>
<s>
Some	O
manufacturers	O
,	O
such	O
as	O
Creative	O
Technology	O
,	O
also	O
provide	O
legacy	O
MTP	O
drivers	O
for	O
some	O
of	O
their	O
players	O
;	O
these	O
usually	O
consist	O
of	O
MTP	O
Porting	O
Kit	O
files	B-Operating_System
with	O
a	O
customized	O
INF	O
file	O
describing	O
their	O
specific	O
players	O
.	O
</s>
<s>
Windows	O
does	O
not	O
assign	O
drive	O
letters	O
or	O
UNC	O
pathnames	O
to	O
devices	O
connected	O
via	O
MTP	O
;	O
instead	O
,	O
they	O
only	O
appear	O
as	O
named	O
devices	O
in	O
MTP-aware	O
applications	O
such	O
as	O
Windows	B-Protocol
Explorer	I-Protocol
.	O
</s>
<s>
Compared	O
to	O
devices	O
that	O
implement	O
USB	B-Architecture
mass	I-Architecture
storage	I-Architecture
,	O
such	O
devices	O
cannot	O
be	O
accessed	O
programmatically	O
by	O
scripts	O
or	O
normal	O
Windows	O
programs	O
that	O
depend	O
on	O
drive	O
letters	O
or	O
UNC	O
paths	O
.	O
</s>
<s>
Instead	O
,	O
files	B-Operating_System
must	O
be	O
manipulated	O
using	O
Windows	B-Protocol
Explorer	I-Protocol
or	O
applications	O
with	O
specially	O
written	O
MTP	O
support	O
.	O
</s>
<s>
Under	O
Windows	O
,	O
MTP-compatible	O
devices	O
support	O
a	O
feature	O
called	O
Auto	O
Sync	O
,	O
which	O
lets	O
users	O
configure	O
Windows	B-Device
Media	I-Device
Player	I-Device
to	O
automatically	O
transfer	O
all	O
copied	O
or	O
newly	O
acquired	O
content	O
to	O
devices	O
whenever	O
they	O
are	O
connected	O
-	O
provided	O
that	O
content	O
is	O
compatible	O
with	O
Windows	B-Device
Media	I-Device
player	I-Device
.	O
</s>
<s>
Copies	O
of	O
files	B-Operating_System
accessed	O
over	O
MTP	O
may	O
remain	O
on	O
the	O
host	O
computer	O
even	O
after	O
reboot	O
,	O
where	O
they	O
will	O
be	O
accessible	O
to	O
the	O
user	O
account	O
which	O
accessed	O
them	O
,	O
as	O
well	O
as	O
any	O
other	O
user	O
accounts	O
able	O
to	O
read	O
that	O
user	O
account	O
's	O
files	B-Operating_System
,	O
including	O
any	O
administrative	O
users	O
.	O
</s>
<s>
Windows	B-Device
7	I-Device
's	O
sensor	O
platform	O
supports	O
sensors	O
built	O
into	O
MTP-compatible	O
devices	O
.	O
</s>
<s>
In	O
the	O
implementation	O
of	O
MTP	O
used	O
by	O
Windows	B-Protocol
Explorer	I-Protocol
,	O
files	B-Operating_System
from	O
a	O
selection	O
moved	O
out	O
of	O
a	O
mobile	B-Application
device	I-Application
's	O
storage	O
,	O
perhaps	O
with	O
the	O
goal	O
of	O
freeing	O
up	O
space	O
,	O
are	O
not	O
deleted	O
individually	O
from	O
the	O
source	O
after	O
each	O
file	O
,	O
but	O
instead	O
the	O
entire	O
selection	O
becomes	O
deleted	O
at	O
once	O
from	O
the	O
source	O
only	O
after	O
the	O
transfer	O
has	O
finished	O
.	O
</s>
<s>
A	O
free	O
and	O
open-source	O
implementation	O
of	O
the	O
Media	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
is	O
available	O
as	O
libmtp	O
.	O
</s>
<s>
GNOME	B-Application
applications	O
like	O
GNOME	B-Language
Files	I-Language
(	O
formerly	O
called	O
Nautilus	B-Language
)	O
and	O
Archive	B-Application
Manager	I-Application
(	O
formerly	O
called	O
File-Roller	B-Application
)	O
use	O
GIO-based	O
GVfs	B-Language
to	O
access	O
files	B-Operating_System
on	O
MTP	O
devices	O
.	O
</s>
<s>
Proper	O
MTP	O
support	O
was	O
added	O
to	O
GVfs	B-Language
in	O
version	O
1.15.2	O
(	O
2013-01-15	O
)	O
by	O
Philip	O
Langdale	O
.	O
</s>
<s>
Early	O
patches	O
for	O
GVfs	B-Language
to	O
enable	O
Google	B-Application
's	I-Application
direct	O
I/O	O
extensions	O
are	O
available	O
.	O
</s>
<s>
The	B-Application
KDE	I-Application
Project	I-Application
develops	O
the	O
MTP	O
KIO	B-Language
Slave	O
with	O
a	O
similar	O
level	O
of	O
integration	O
as	O
GVfs	B-Language
.	O
</s>
<s>
Not	O
related	O
to	O
GNOME	B-Application
or	O
KDE	B-Application
is	O
the	O
*	O
NIX	O
graphical	O
MTP-capable	O
media	B-Device
player	I-Device
,	O
.	O
</s>
<s>
Several	O
tools	O
provide	O
a	O
FUSE	B-Application
based	O
file	B-Application
system	I-Application
for	O
mounting	O
MTP	O
devices	O
within	O
the	O
Unix	O
filesystem	B-Application
hierarchy	O
,	O
making	O
it	O
accessible	O
to	O
any	O
program	O
that	O
operates	O
on	O
files	B-Operating_System
and	O
directories	O
.	O
</s>
<s>
macOS	B-Application
has	O
built-in	O
support	O
for	O
MTP	O
(	O
through	O
the	O
application	O
"	O
Digital	O
Images	O
"	O
)	O
but	O
no	O
(	O
third-party	O
)	O
drivers	O
to	O
mount	O
MTP	O
devices	O
as	O
drives	O
.	O
</s>
<s>
Also	O
several	O
third-party	O
file	O
transfer	O
applications	O
are	O
available	O
for	O
Mac	B-Application
OS	I-Application
X	O
v10.5	O
and	O
later	O
:	O
</s>
<s>
Android	B-Application
File	O
Transfer	O
is	O
a	O
simple	O
MTP	O
client	O
.	O
</s>
<s>
Android	B-Application
File	O
Transfer	O
For	O
Linux	B-Application
(	O
and	O
Mac	B-Application
OS	I-Application
X	O
)	O
,	O
Open	O
Source	O
,	O
License	O
GPL	O
Version	O
3	O
,	O
Graphical	O
UI	O
,	O
Command	O
line	O
tool	O
,	O
FUSE	B-Application
wrapper	O
-	O
mounting	O
your	O
device	O
,	O
</s>
<s>
Later	O
versions	O
of	O
several	O
operating	B-General_Concept
systems	I-General_Concept
,	O
including	O
AmigaOS	B-Application
,	O
Android	B-Application
,	O
AROS	B-Application
,	O
MorphOS	B-Operating_System
,	O
and	O
Symbian	B-Operating_System
OS	I-Operating_System
support	O
MTP	O
,	O
sometimes	O
with	O
additional	O
drivers	O
or	O
software	O
.	O
</s>
<s>
A	O
disadvantage	O
of	O
MTP	O
devices	O
on	O
Android	B-Application
as	O
compared	O
to	O
USB	B-Architecture
mass	I-Architecture
storage	I-Architecture
is	O
that	O
although	O
file	O
timestamps	O
are	O
preserved	O
when	O
copying	O
files	B-Operating_System
from	O
the	O
Android	B-Application
device	O
to	O
one	O
's	O
computer	O
,	O
when	O
copying	O
in	O
the	O
other	O
direction	O
,	O
the	O
file	O
modification	O
timestamps	O
are	O
replaced	O
with	O
the	O
time	O
the	O
copy	O
was	O
done	O
.	O
</s>
<s>
Companies	O
,	O
including	O
Creative	O
Technology	O
,	O
Intel	O
,	O
iriver	O
,	O
and	O
Samsung	O
Electronics	O
,	O
that	O
manufacture	O
devices	O
based	O
on	O
Microsoft	O
's	O
"	O
Portable	B-Operating_System
Media	I-Operating_System
Center	I-Operating_System
specification	O
"	O
,	O
have	O
widely	O
adopted	O
MTP	O
.	O
</s>
<s>
After	O
an	O
initial	O
period	O
of	O
uncertain	O
reactions	O
,	O
several	O
large	O
media	B-Device
player	I-Device
producers	O
such	O
as	O
Creative	O
Technology	O
and	O
iriver	O
adopted	O
the	O
MTP	B-Protocol
protocol	I-Protocol
in	O
place	O
of	O
their	O
own	O
protocols	O
.	O
</s>
