File Mirroring, VVEngine fills USB fills up to capacity

[MWORB]

Running under WIN XP I am File Mirroring 7gb of files to a 16gb USB Flash drive and using VVEngine. Repeatedly and after initial transfer is sucessful the USB over a few hours incrementally fills until it is shown as being full, VVEngine cannot mirror source to target and returns typical message:
Today at 9:43:46 AM until 9:45:48 AM (2 min 02 sec) - (Changes Detected) - Execution completed with file copy/delete errors.

I cannot see where the extra 10gb of files are being stored and all the files tht were mirrored on the first transfer are accessible on the target USB.
I have removed all OUTLOOK files from the Source as these are subject to constant change so that 99.9% of the files being mirrored are now static and in the main only WORD files that I am adding to and editing are changing. I have set VVEngine to run every 5mins. I have sucessfully run ViceVersa over several years but only tried VVEngine in the last week.

Suggestions and fixes welcome, thanks Peter

[TGRMN Software]

Any useful information in the profile log ? (you can setup a log in profile settings -> execution) thanks
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