Is this the best way to use Veracrypt in my case??

I have 5TB external HDD.
I just encrypted as non system partition the full disk.
Now the disk is empty.
If I want to add 2TB of files, I just mount it, add the files and unmount it?
Its that easy to keep all files safe? Will these be encrypted automatically?
And will then be slow to access them or the time to mount and unmount will remain unchanged?


To summarize, I want to know if I'm using veracrypt in …

case disk easy encrypted external files hdd non privacy safe system veracrypt