Kind of an aside, but if you are going to digitize important documents that contain confidential information, I would highly recommend encrypting them to mitigate any damage if your files were to be compromised. It adds an extra hurdle to accessing them, but is worth the peace of mind in my opinion. I can recommend VeraCrypt [1] as an easy to use encryption software for this purpose.
Additionally, I would also recommend backing them up offsite somewhere such as Backblaze B2 [2], making sure to encrypt all files there (even ones that are not encrypted on your local drive) using something like Restic [3].