<s>
A	O
personal	B-General_Concept
cloud	I-General_Concept
is	O
a	O
collection	O
of	O
digital	O
content	O
and	O
services	O
which	O
are	O
accessible	O
from	O
any	O
device	O
.	O
</s>
<s>
The	O
personal	B-General_Concept
cloud	I-General_Concept
is	O
not	O
a	O
tangible	O
entity	O
.	O
</s>
<s>
It	O
is	O
a	O
place	O
which	O
gives	O
users	O
the	O
ability	O
to	O
store	B-General_Concept
,	O
synchronize	O
,	O
stream	O
and	O
share	O
content	O
on	O
a	O
relative	O
core	O
,	O
moving	O
from	O
one	O
platform	B-Device
,	O
screen	O
and	O
location	O
to	O
another	O
.	O
</s>
<s>
Created	O
on	O
connected	O
services	O
and	O
applications	B-Application
,	O
it	O
reflects	O
and	O
sets	O
consumers’	O
expectations	O
for	O
how	O
next-generation	O
computing	O
services	O
will	O
work	O
.	O
</s>
<s>
The	O
four	O
primary	O
types	O
of	O
personal	B-General_Concept
cloud	I-General_Concept
in	O
use	O
today	O
are	O
:	O
Online	O
cloud	O
,	O
NAS	B-Application
device	O
cloud	O
,	O
server	B-Application
device	O
cloud	O
,	O
and	O
home-made	O
clouds	O
.	O
</s>
<s>
Online	O
cloud	O
is	O
the	O
cloud	B-Architecture
computing	I-Architecture
model	O
where	O
online	O
resources	O
like	O
software	O
and	O
data	B-General_Concept
storage	I-General_Concept
are	O
made	O
available	O
over	O
the	O
Internet	O
by	O
a	O
service	O
provider	O
.	O
</s>
<s>
In	O
an	O
online	O
cloud	O
model	O
,	O
cloud	B-Architecture
services	I-Architecture
are	O
provided	O
in	O
a	O
virtualized	O
system	O
,	O
are	O
constructed	O
using	O
pooled	O
,	O
shared	O
physical	O
resources	O
and	O
are	O
accessed	O
by	O
the	O
Internet	O
.	O
</s>
<s>
The	O
data	O
and	O
applications	B-Application
provided	O
by	O
the	O
service	O
provider	O
are	O
logically	O
segregated	O
so	O
that	O
only	O
those	O
authorized	O
are	O
allowed	O
access	O
.	O
</s>
<s>
A	O
network-attached	B-Application
storage	I-Application
(	O
NAS	B-Application
)	O
device	O
is	O
a	O
computer	O
connected	O
to	O
a	O
network	B-Architecture
that	O
provides	O
only	O
file-based	O
data	B-General_Concept
storage	I-General_Concept
services	O
to	O
other	O
devices	O
on	O
the	O
network	B-Architecture
.	O
</s>
<s>
Although	O
it	O
may	O
technically	O
be	O
possible	O
to	O
run	O
other	O
software	O
on	O
a	O
NAS	B-Application
device	O
,	O
it	O
is	O
not	O
designed	O
to	O
be	O
a	O
general	O
purpose	O
server	B-Application
.	O
</s>
<s>
Cloud	O
NAS	B-Application
is	O
remote	O
storage	O
that	O
is	O
accessed	O
over	O
the	O
Internet	O
as	O
if	O
it	O
were	O
local	O
.	O
</s>
<s>
A	O
cloud	O
NAS	B-Application
is	O
often	O
used	O
for	O
backups	O
and	O
archiving	O
.	O
</s>
<s>
One	O
of	O
the	O
benefits	O
of	O
NAS	B-Application
Cloud	O
is	O
that	O
data	O
in	B-Architecture
the	I-Architecture
cloud	I-Architecture
can	O
be	O
accessed	O
at	O
any	O
time	O
from	O
anywhere	O
.	O
</s>
<s>
The	O
main	O
drawback	O
,	O
however	O
,	O
is	O
that	O
the	O
speed	O
of	O
the	O
transfer	O
rate	O
is	O
only	O
as	O
fast	O
as	O
the	O
network	B-Architecture
connection	O
the	O
data	O
is	O
accessed	O
over	O
and	O
can	O
therefore	O
be	O
fairly	O
slow	O
.	O
</s>
<s>
Typically	O
,	O
the	O
cloud	O
server	B-Application
is	O
an	O
on-premises	O
device	O
that	O
is	O
connected	O
to	O
the	O
Internet	O
and	O
gives	O
users	O
the	O
functions	O
available	O
on	O
the	O
online	O
cloud	O
but	O
with	O
the	O
added	O
benefit	O
and	O
security	O
of	O
the	O
files	O
being	O
in	O
their	O
control	O
on	O
their	O
premises	O
.	O
</s>
<s>
The	O
server	B-Application
cloud	O
has	O
been	O
historically	O
enterprise-based	O
deployed	O
by	O
businesses	O
needing	O
an	O
in-house	O
cloud	O
.	O
</s>
<s>
For	O
the	O
more	O
technologically	O
proficient	O
user	O
a	O
common	O
solution	O
for	O
using	O
a	O
personal	B-General_Concept
cloud	I-General_Concept
is	O
to	O
create	O
a	O
home-made	O
cloud	O
system	O
by	O
connecting	O
an	O
external	O
USB	B-Protocol
hard	B-Device
drive	I-Device
to	O
a	O
Wi-Fi	O
router	B-Protocol
.	O
</s>
<s>
This	O
enables	O
both	O
wired	O
and	O
wireless	O
computers	O
to	O
access	O
the	O
USB	B-Protocol
hard	B-Device
drive	I-Device
and	O
use	O
it	O
for	O
storage	O
or	O
for	O
retrieving	O
files	O
a	O
user	O
needs	O
to	O
share	O
on	O
the	O
network	B-Architecture
thereby	O
acting	O
like	O
a	O
cloud	O
.	O
</s>
<s>
The	O
challenge	O
for	O
the	O
home-made	O
cloud	O
is	O
that	O
in	O
order	O
to	O
set	O
it	O
up	O
a	O
user	O
has	O
to	O
have	O
a	O
certain	O
degree	O
of	O
skills	O
in	O
technology	O
and	O
network	B-Architecture
setup	O
.	O
</s>
<s>
Not	O
every	O
router	B-Protocol
supports	O
this	O
type	O
of	O
access	O
and	O
modification	O
.	O
</s>
