Never trust a computer that you do not own. The "cloud" is a network of computers you don't own:
So download everything. Buy hard drives and hoard as you go. Mirror that data once or twice. Store a copy powered off and unplugged. Burn the super important stuff to archival grade M-DISCs. Run AirSonic or something open source to permit remote access of your media. And if you have some terabytes to spare, download and seed some torrents of public government information that has since been scrubbed from official websites.