Generally, when a company releases such a product, and if they made a "restore feature", it is to an extent useless without a "backup feature".
Until emulators came along later, it's not like users had saves to restore. Users could have made backups with competitors tools, but the company really wouldn't want that know, would they? It makes no financial sense.
That seems different from the ones I know, could you upload a picture?
The one I owned didn't backup games (I don't remember if it had a restore function, but for the reason explained prior: backup and restore typically comes in pairs), but yours clearly is slightly different, since mine didn't have a SD slot.
Well, if your AR doesn't have a restore option, there isn't any real point in any of this now, is there? :<