Okay, it looks like it was the cable after all. I tried a couple more cables and found one that works.

I will say the device seems to be extremely picky about the cable used. I tried eight cables overall before finding one that works. A few of the cables that did not work with the TinySaber *did* work to upload data to a TinyArcade, and with other devices like transferring data to a phone. So for whatever reason, the TinySaber seems to be more picky.

Thanks for your help!

I'm not sure why the Tiny Saber would be picky about a cable that's able to transfer data to a Tiny Arcade, but I'm glad you've got a cable working with it.

Thanks for the update!