Two of my favorite file/disk encryption tools here.
Veracrypt has two main functions:
- It can encrypt entire disk volumes, including boot drives.
- It can create encrypted file containers that exist as a single file that can be stored, copied and backed up like any other file.
https://www.veracrypt.fr/en/Downloads.html
Cryptomator is less advanced compared to Veracrypt but is very good at what it does:
Unlike Veracrypt that creates a single encrypted container for your files, Cryptomator encrypts each file individually. This allows it to work well with cloud storage providers like Dropbox where it would be very inefficient to download an entire container just to access one file inside of it.