Japan's government has finally eliminated the use of floppy disks in all its systems, two decades since their heyday, reaching a long-awaited milestone in a campaign to modernize the bureaucracy. By the middle of last month, the Digital Agency had scrapped all 1,034 regulations governing their use, except for one…
3.5 inch disks only held about 2MB on a good day. Reliable or not, you won’t get much on that disk these days.
Unless you are going to make your own backups and take them somewhere else, I would use a cloud solution. Yes, you have to trust the company you choose not to fuck with your data, but they are fault-tolerant solutions that will likely last longer than some random removable solution.