1 = ok well so be it. but don’t pay more than €100.❊
2 = don’t.❊❊
3 = turn it off NOW.❊❊❊
❊ a 2015 macbook air with 8gb of ram and a good battery can be had secondhand for €100 or less. look for a battery with 200 or 300 cycli or less. but you can replace the battery if you’re a little bit handy for about €30.
❊❊ icloud may decide that you don’t need certain files on your machine. it doesn’t say : hey there you could save x amount of space if you store these files on icloud instead of on your machine. would you like to do that? no. it deletes the files and replaces them with ‘stubs’, these are icons that look to all intents and purposes as if the files are on your internal machine but they’re not. they’re on apple’s servers and only on apple’s servers. if you click on a stub the file will download and open, IF you’re online and logged in to your apple account.
AND : you can’t back up these files using time machine — nor with any other backup software.
❊❊❊ see this article.
ps you can request your files from apple here. it will take seven days.