You can fix the synchronisation errors in HiDrive due to invalid file and directory date with free external programs that we describe here.
The synchronisation errors are displayed with the following error messages:
Change date (from local file/directory) not valid
Change date (from file/directory to HiDrive) not valid
Creation date of local file/directory not valid
Creation date from file/directory to HiDrive not valid
You can correct this by using the following free programs to change the modification or creation date:
For more information on downloading and operating the programs, please refer to the respective program websites.