Files extracted from an archive have particular permissions that prevent SyncTime from accessing them before the process has completed. Only when the process has completed SyncTime is able to access the extracted files without errors. There are some workarounds:

SyncTime itself does not use encryption, but you can encrypt the destination volume and protect it with a password. When connecting a password-protected volume, you’ll be asked by macOS to enter the password; you can also store the password in the keychain so that you don’t have to enter it every time when connecting it…

At the core, both apps create copies of your data. Time Machine is designed to create incremental backups of your Mac. SyncTime can do that too (although it’s not allowed to access some system files), but it can also synchronize files and allows you to customize various settings depending on your needs. Time Machine is…

By default, other users’ files cannot be accessed, not even by an administrator. To get access to other users’ files, you have to add explicit permissions.

No. SyncTime relies on the file copy mechanism provided by macOS, which returns an error if something goes wrong. If an error happens, SyncTime always displays it. If no error happens, with all probability the copy operation was successful and there’s no need to perform an additional verification of the copied data, which would double…

Please see Sync confirmation dialog.

No. SyncTime offers the option to compare the modification date and/or size of a file to avoid comparing the actual file contents, which depending on the file size could take a long time. A checksum (or hash) is a short character sequence computed from a given input (e.g. a file). A checksum is, with high…

SyncTime syncs the source with the destination. It does not sync the source with the file inside the destination that has the same name as the source. That’s why the source and the destination need to have the same type: they both need to be either directories, packages or regular files. Photos Library In a…

macOS sometimes creates files that are hidden in the Finder and may cause confusion when mentioned in a sync error or listed in the sync confirmation dialog. Tip: you can toggle the display of hidden files in the Finder with the keyboard shortcut Command-Shift-. For additional help, see Filters.