

Oh, absolutely. It’s not something which should be encouraged, and against a well designed modern system it probably isn’t possible (there must be some challenge-response type NFC systems on the market).
I’m just saying it isn’t unambiguously “illegitimate”






There are a million ways to back data up, many of them are as simple as “copy it to removable media”, and don’t require any clever operating system features at all.
What removable media you can use depends on the quantity of data, and how long you need the backup to last. Maybe DVDs, or USB drives. If the data is valuable enough, you can also pay for cloud storage and upload it