Don’t buy an external SSD. Make your own for cheap instead!
There are lots of premade external SSDs on the market, but your options are way more diverse if you just go the home-brewed ...
How to format USB drives on Linux, MacOS, and Windows
The first step is to insert the USB drive into your Linux-powered desktop or laptop. Next, open GNOME Disks (it might be called "Disks," depending on your distribution), and then select the USB flash ...