have you tried changing
HKEY_LOCAL_MACHINE\system\StorageManager\FATFS\Fla gs to 44 ?
default should be 104. Setting to 44 seems to improve it for many people. Perhaps this will help you as well.
Additionally, you could try changing FileSystem cache..
see
http://www.ppcgeeks.com/wm5-registry...rage+card.html
for the large list of WM5 hacks, but here is a snippet:
Enable FileSystem cache
To enable the FileSystem cache, speeding up overall performance at the risk of the cache not being written on a sudden reset:
HKLM\System\StorageManager\FATFS\EnableCache = 1 (DWORD decimal)
To disable again:
HKLM\System\StorageManager\FATFS\EnableCache = 0 (DWORD decimal)
Note that by default, the cache size is zero, and you will see no effect. See "Increase FileSystem cache" to incease the cache size
Increase FileSystem cache
To increase the file system cache:
HKLM\System\StorageManager\FATFS\CacheSize = 4096 (DWORD decimal)
To return the file system cache to zero:
HKLM\System\StorageManager\FATFS\CacheSize = 0 (DWORD decimal)
You can set the value to pretty much anything you like