Microsoft has released a new
update for Windows 7 to boost the performance of
USB storage devices by
increasing the maximum
transfer size from 64 KB to 2
MB in the Usbstor.sys driver.
The update is KB2581464 and it's only available for
download and not served as an automated refresh through
Windows Update.
After you install this update, you can
increase the maximum
transfer size from 64 kilobytes
(KB) to 2 megabytes (MB) in
the Usbstor.sys driver."
Once you have installed
kb2581464 update you need to
follow below steps to increase
transfer speed,
1. Click on start menu or press
Windows + r keyboard key&
enter regedit and start registry
editor
2. Now navigate for following
registry path HKEY_LOCAL_
MACHINESYSTEMCurrentControlS
etControlusbstorVVVVPPPP (VVVV represents device
descriptor idVendor in
hexadecimal. PPPP represents
device descriptor idProduct in
hexadecimal.)
3. Click Edit, point to New, and
then click DWORDValue.
4. Type
MaximumTransferLength, and
then press Enter.
5. Click Edit, and then click
Modify.
6. In the Value data box, type a value to specify the
maximum transfer size
between 65535 (64KB) and
2097120 (2MB)
click here to download update