cryptomator for external hard disk?

hello I am new and have no idea of encryption at all.

I have 3 external hard drives which have together a size of 4tb. I bought 2 new hard drives with a size of 4tb. there are many pictures, video, documents files and many folders.

what is recommended for consumers? is it better to use another program?

if yes and it should be a container. is a single large 4tb container recommendable to create, what happens with the speed?

Cryptomator is intended for the encryption of files that are to be stored on an online storage.

There are more suitable programs for the encryption of hard disks, such as veracrypt.
In my experience, the influence on speed is hardly noticeable