error during mirror job

[sjbrowser]

Anyone ever see an error like this:

9:01:42 PM Error Cannot copy file
"L:\downloads\utilities\Systools PST Viewer\Outlook Recovery tool\storage folder\recovered pst files\file.PST.pst" to
"M:\downloads\utilities\Systools PST Viewer\Outlook Recovery tool\storage folder\recovered pst files\file.PST~63f9.ffs_tmp".
ERROR_NO_SUCH_DEVICE: A device which does not exist was specified. [CopyFileEx]

Just trying to sync (MIRROR setting) the entire L drive to the M drive. But 5 or 6 files like the above one error out. 95% of the rest of the files in the job sync just fine. The job used to complete 100% each night (for the past month or so). Then suddenly the last couple of days I get that error on those files. Not sure what to do next. Could it be that those select files are "corrupt"? I mean, does FFS even CARE about whether a file is corrupt or not? Doesn't it just copy the whole file? It doesn't run a chkdsk or the like on any files, does it?

Any ideas would be most appreciated.

thank you,
SJ

[sjbrowser]

Can anyone help here?

SJ

[Gianni1962]

Try once with your antivirus disabled.

[xCSxXenon]

What are the locations?