Problem with synchronizing one HDD with one Directory

[benny2007]

Dear All,

in the past i have synchronized various times one external HDD with one certain directory (internal PC HDD) in order to create a backup on my internal PC-HDD.

When starting this time with "compare" none of the file of the internal backup HDD was detected and FreeFileSync started to sync all files.
Comparing the files of the external HDD with the internal HDD (backup) in the "Compare Modus", nearly 99 % of the files are identical. Why FreeFileSync starts to sync all completely, which will need more than 10hours.

Any Ideas?
Help would be fine.
benny

[Plerry]

Likely, the problem is related to the recent changeover from daylight saving time to standard time.
See here.