Resetting but keeping last day's files

If you're thinking like the Time Machine facility for MacOS, then no, it does not exist under Linux by default. There are programs to do periodic backups and that fairly economical in terms of disk space. For example, timeshift for system files or rsnapshot for personal files. However, none of them (as far as I know) are set up automatically. You would have to set them up yourself.

If you haven't set them up manually, then what you're asking for isn't possible.