Hi. I have a Beelink Pocket P1 SoC (system on chip). I have upgraded from 8.1 to 10 without too much trouble, but as the sytem has very limited space on C: (32GB to start, after programs and files I'm left with less than 5GB), I wish to know if I can purchase an external drive, somehow copy Win10 or whatever I need to the external drive and boot up from there if possible. The Beelink is about the size of a large smartphone and probably the same as external drive. I'm guessing I need to get into BIOS (I can) to get the system to look for external drives before booting from C: - How do I do this please? Ideally, can anyone step me through the process please.