I’m looking to get a new internal hard drive for a specific use case:

• it’s for a desktop, meaning I can fit either
• i need 2TB, no more and no less, also meaning I can get either
• it’s for my media collection, mostly movies
• it’s not gonna be read-only, but I wouldn’t write too often (I would torrent, but all the program’s metadata would be on another drive)
• most likely gonna be formatted with btrfs (subject to change, open to suggestion)

Should I get the 2.5 inch or the 3.5 one?

Thanks in advance.