How come you don't make backups instead? IE; do a backup to a drive using Borg or something, then you're not manually managing files.
Also if these are important files consider also backing them up online, Restic to a service like Wasabi or Backblaze B2 is a good option.
This is what RAID is for. Duplicate, or at least spread, data across multiple disks so that a failure of one disk doesn't result in data loss.
Sounds like something a backup solution like Bacula would handle. However, I am not quickly seeing a solution.
Are you physically swapping hard drives in and out of your system, or are they all connected at once?
yes, can't connect all hdd to laptop so only using 1 drive at one time in an external enclosure. some drives are portable drives, some are internal drives. its a mix of internal and external drives.