bug synchronising two NAS Folder

[gaiusbonus]

Hello,
I try to synchronise two NAS Harddisks.
TC finds about 5000 Folders that seem to be only on one Harddisk (all in one Subdirectory with geocache database).
When trying to synchronise it asks if it should overwrite. All Folders are on both harddisks.
I noticed this bug with 7.56, updated to 8.01; still the same.

[ghisler(Author)]

This seems to be a bug of some NAS devices - they simply don't list the files when trying to list many folders. Please do not use sync if you get this problem.