Install VeraCrypt on my Raspberry Pi

I have a Raspberry Pi (and keyboard and mouse and monitor) and I want to use it for keeping a copy of my company's database. However, the thumb drive I will be using must become an encrypted drive so that I do not publish personal details of all our service users by mistake.

You must install VeraCrypt on a Raspberry Pi model 4. However, if this is not possible, then you can install it on my model 3. .

I will visit you (you must be within an hour's drive of London) and watch while you get it working and then I'll pay cash and take my machine away. If absolutely necessary I will leave the machine with you for 24 hours. No more.