If you're doing a straight swap and clean install; you'll only need a boot USB with the OS of choice.
If you're going to clone the original drive, you'll need a way of either backing up the drive externally with Time Machine etc or an external USB caddy to put the SSD in and clone the drive (with clone software).
If you're doing a straight swap and clean install; you'll only need a boot USB with the OS of choice.
If you're going to clone the original drive, you'll need a way of either backing up the drive externally with Time Machine etc or an external USB caddy to put the SSD in and clone the drive (with clone software).