zmaint I have used the previous truecrypt (defunct) and Veracrypt (repo) is what I use now
never had any issues with container files.
Make a big enough encrypted container file then you just mount it when needed and it shows up as a
drive copy your stuff to it.
When done unmount it.
I like containers they seem to be fool proof and very reliable over the years.
Its menu driven to make a container and then just passwords to mount and unmount.
Use Aes-Twofish and Sha512 for containers.
