I’ve seen a lot of people having a similar issue to myself with the WDTV units. So I have a WDTVLIVE device on the network (everything is wired in my case so no wireless) and I have attached a 1TB Lacie USB drive to the WDTV device and I want to copy files from my PC to this device which appears in explorer.
What happened was that when copying large files >2gb to the WDTV network share from my Windows 7 (x64 in my case) PC then explorer seemed to “hang” and/or the transfer would time out and ethen usually explorer reports that it is having problems seeing the share and the file didn’t copy.
There are a lot of suggested “fixes” like
Using TCPOptimizer to “fix” the networking on windows 7/XP etc.
Ditching the factory firmware and switching to WDLXTV then formating the external drive as ext3 and/or forgetting samba and enabling ssh and copying via ftp etc.
Using external utilities such as teracopy etc.
I’m interested to know if anyone else was able to solve this problem the same way I did by simply reformatting the external USB from a Windows 7 PC as NTFS but setting the allocation unit size to 8192 bytes (note the default is 4096). I then plugged it back into the WDTV and I was able to copy very large files at a respecatable ~10MB/sec to the share from my PC. FYI I also tried an allocation unit size of 64K but had the same problems as I did with the default of 4k.
http://support.microsoft.com/kb/314878 “The Default Cluster Size for the NTFS and FAT File Systems:”
There is an old post here http://www.avsforum.com/avs-vb/showthread.php?t=1126478 that suggests a similar fix to enable the WDTV to actually see 3rd party drives >500GB
Hope this helps someone because I read a lot of dead-end posts regarding this topic.