Also experienced same type of problem with MyBook Essentials 2TB drive. Was trying to save a 32 MB file from Photoshop 7 to the MyBook and got the “disk full” error message. Saved the file to an internal hard drive.
Checked drive properties and saw used space was only 385 GB and 1.44 TB was free. Checked in Disk Management and the drive showed up as a basic disk with a primary partitoin of 1862.36 GB formatted as NTFS.
WD software not installed
SES driver not installed
Installed the SES driver and tried to save the file from Photoshop again. Result was the same - “disk full”. Restarted computer and tried saving the file from Photoshop again - same result.
Used Windows Explorer to “drag” the file into the external drive - that worked.
So, what is the source of the problem? It should not be Photoshop 7 since that was able to save to an internal drive. It should not be Windows 2000 because the Windows Explorer had no problem saving the same large file to the MyBook.
If anyone has an answer/a solution, please post it!