About a year ago I bought an iPod Clone in Aldi (super market).
The brand is "Medion" - quite good actually - but the design is

(I read someone calling it "Eric Honecker design")
It has one speciality however - it has a builtin SD/MMC slot for reading AND writing. Besides this it also sports a OTG (USB - On The Go) - in other words - a USB Master connecter. The firmware has a file management part that allows files or filestructures to be copied between the builtin harddrive (20GB) and the inserted card.
This makes it perfect as a backup storage for movies, maps, litterature, encyclopedias, pictures .....
It's not fast - about 15-20 minuttes for 1 GB - but it's much faster than WiFi - and it does it without using the Axim in the meanwhile. The battery lasts for about 5-6 hours, but I have a spare.
I've used the last year now - works for me.
There are other similar solutions around - most of them are for the photo people to empty their camera cards onto. Some of these can also copy from the harddrive to the inserted cards and not only the other way. Some of these use 2½" drives, others use 1.8" drives.
I attached a picture of the "alternative"
Regards

Will