Backing up/ duplicating 360 files whilst on holiday- any suggestions?

I would be grateful for any suggestions on how to can backup/duplicate my 360 videos and stills whilst on holiday ( mainly cruising ) without having access to a laptop, and to be as little weight as possible.- (a small card duplicator- to make copies only or copy and store ) I did think of a couple of options- (1) backing up by steaming to an account like One Drive- this would be slow and very expensive. (2) Using a backup device that has a MicroSD card reader like the WD MyPassport Wireless Pro portable External drive – the Wifi on this could be very useful as well for playback This drive doesn’t seem to be available at present, anyone know of a similar drive: https://www.amazon.co.uk/WD-TB-Passport-Wireless-Pro/dp/B01M11SPVS?th=1 How do the professionals backup their valuable files whilst away/ abroad? I always worry I’m going to loose my MicroSDs!  Thanks