How to backup SD cards without a computer/laptop using the RavPower AC750 FileHub

The app shown in this video is no longer available.  Instead use this app:
https://apps.apple.com/us/app/newhub/...

Both the LaCie Rugged BOSS and the GNARBOX 2.0 are stupid expensive and almost impossible to find.  This inexpensive device does the job and much more for $60.  And you are not locked into any internal storage capacity as you provide the external storage.  The only thing you give up is the weather proofing and "ruggedness".

Products I purchased for this video:
RavPower FileHub New Version AC750 Wireless Travel Router $59.99
https://www.ravpower.com/products/rp-...

1 TB Portable Solid-State Drive (fingerprint security) $84.00
https://www.ravpower.com/products/vav...