Switchover between Daylight Saving and Standard Time

How does the switchover affect the copying of files?

After a switchover between standard and daylight-saving time, the modified date/time of two identical files in the source and destination folders may exhibit a time differential of one hour. Depending on the Copy Rules settings, the identical files are recopied.

Which files are affected by the switchover?

The time differential occurs only if the one file is located on a FAT partition and the respective file on the other side is located on an NTFS partition.

What do I have to do before the switchover?

Before the switchover, you should perform a copy operation so that all the files in the source and destination folder exhibit the same time stamp. You should not change any files between the time you perform the copy operation and the time switchover.

What do I have to do after the switchover?

There are two ways to remedy the problem:

You activate the Treat files with a modified time differential of ... option in the Copy Rules and specify an exact time differential. This prevents AllSync from recopying all files.
You start a copy operation using a profile so that all files are copied and the time differential is eliminated.