This is a bad scenario on premade company machines that have soldered parts.
This is never issue on custombuilt/or from company that lets you edit the computer.
external harddrive for backing up.
replacing motherboard possible on said machines.
onedrive is pretty fast for backups, even with 6mbps down 1 mbps up.
in all cases, just backup. 1gb is about a 2 minute transfer.