Help with storage

[Superflyguyuk]

Hi

I have a MSI MPG B550 GAMING EDGE WIFI Motherboard, with 2 x2tb m.2 SSD cards installed and a 3rd 2tb SSD installed using internal data port.

I have the 2 m.2 drives purely for games storage, and the other as my movie library.
I build this pc 2 years ago and all the drives are pretty much full, so much so that I've deleted some games and movies to give me a couple of gigs on each drive to play with
I am looking for storage options, I will still collect movies but not at the same rate as I have most of my classics, and games, I usually play AAA titles so they take up a lot of space.

I don't mind dumping all my old movies and games onto a 4th (maybe 4TB SSD) drive with slower transfer speeds just as a long term storage device and the rest to use as my current favourite games movie drives.
Thanks

 

[Superflyguyuk]

Thank you for all your brilliant replies.
I am using a CoolerMaster MasterBox TD500 Mesh, I know it sounds stupid but this was my first PC build and as it was when everyone was installing m.2 storage and SSD's I never read up on HDD's as I thought it was dead technology.
I will be using the drive just as a library, I only watch movies on my tablet, as I'm a fan of old gangster, and WW2 movies, with the occasional blockbuster for my Mrs to watch on our 4k 60" TV.
So I should go for as big TB drive I can afford, what connector is best for speed as I don't want to wait for ages transferring data onto or of it?
On my last PC it was a ready built one with 2 internal HDD and an extra external HDD, connected via usb a and it was snail like!