<s>
SyncToy	B-Application
was	O
a	O
freeware	B-License
tool	O
in	O
Microsoft	O
's	O
PowerToys	B-Application
series	O
that	O
provided	O
an	O
easy-to-use	O
graphical	B-Application
user	I-Application
interface	I-Application
for	O
synchronizing	O
files	O
and	O
folders	O
in	O
Windows	O
versions	O
XP	B-Application
,	O
Vista	O
,	O
7	O
and	O
10	O
.	O
</s>
<s>
It	O
was	O
written	O
using	O
Microsoft	B-Application
's	I-Application
.NET	I-Application
Framework	I-Application
and	O
used	O
the	O
Microsoft	B-Device
Sync	I-Device
Framework	I-Device
.	O
</s>
<s>
These	O
folders	O
can	O
be	O
on	O
the	O
local	O
drive	O
,	O
on	O
an	O
external	O
device	O
such	O
as	O
a	O
flash	O
drive	O
,	O
or	O
on	O
a	O
network	B-General_Concept
share	I-General_Concept
from	O
another	O
computer	O
.	O
</s>
<s>
SyncToy	B-Application
supports	O
UNC	O
paths	O
.	O
</s>
<s>
It	O
provides	O
a	O
Browse	O
option	O
to	O
find	O
the	O
folder	O
or	O
network	B-General_Concept
share	I-General_Concept
,	O
or	O
users	O
can	O
type	O
it	O
in	O
directly	O
.	O
</s>
<s>
SyncToy	B-Application
offers	O
two	O
safeguards	O
to	O
ensure	O
that	O
the	O
user	O
does	O
not	O
lose	O
files	O
permanently	O
when	O
they	O
are	O
deemed	O
unnecessary	O
during	O
a	O
sync	O
.	O
</s>
<s>
Firstly	O
,	O
a	O
user	O
can	O
preview	O
what	O
is	O
going	O
to	O
happen	O
when	O
the	O
sync	O
takes	O
place	O
,	O
without	O
actually	O
changing	O
anything	O
;	O
secondly	O
,	O
any	O
deleted	O
files	O
are	O
optionally	O
moved	O
to	O
the	O
Recycle	B-Application
Bin	I-Application
.	O
</s>
<s>
SyncToy	B-Application
defines	O
three	O
different	O
types	O
of	O
operation	O
to	O
synchronize	O
two	O
folders	O
:	O
</s>
<s>
To	O
do	O
this	O
,	O
SyncToy	B-Application
may	O
copy	O
files	O
in	O
either	O
direction	O
and	O
may	O
delete	O
or	O
rename	O
files	O
in	O
either	O
folder	O
.	O
</s>
<s>
The	O
other	O
version	O
will	O
be	O
overwritten	O
(	O
but	O
can	O
be	O
recovered	O
via	O
the	O
Recycle	B-Application
Bin	I-Application
if	O
one	O
's	O
settings	O
specify	O
that	O
all	O
deletions	O
go	O
to	O
the	O
Recycle	B-Application
Bin	I-Application
)	O
.	O
</s>
<s>
SyncToy	B-Application
supports	O
32-bit	O
and	O
64-bit	O
versions	O
of	O
Windows	O
7	O
,	O
Windows	O
Vista	O
,	O
and	O
Windows	B-Application
XP	I-Application
.	O
</s>
<s>
SyncToy	B-Application
started	O
as	O
a	O
Powertoy	B-Application
for	O
Windows	B-Application
XP	I-Application
.	O
</s>
<s>
These	O
versions	O
were	O
written	O
in	O
Microsoft	B-Application
's	I-Application
.NET	I-Application
Framework	I-Application
but	O
contained	O
their	O
own	O
code	O
for	O
folder	B-Application
synchronization	I-Application
.	O
</s>
<s>
This	O
was	O
a	O
rewritten	O
version	O
built	O
to	O
use	O
the	O
Microsoft	B-Device
Sync	I-Device
Framework	I-Device
.	O
</s>
<s>
SyncToy	B-Application
2.1	O
was	O
released	O
on	O
November	O
10	O
,	O
2009	O
,	O
and	O
includes	O
several	O
minor	O
enhancements	O
and	O
fixes	O
for	O
several	O
bugs	O
,	O
including	O
a	O
serious	O
issue	O
where	O
data	O
on	O
NAS	B-Application
would	O
be	O
corrupted	O
,	O
and	O
another	O
where	O
deletes	O
would	O
not	O
be	O
synchronized	O
when	O
in	O
Echo	O
mode	O
.	O
</s>
