Thanks for the quick replies! I didn't know it was so easy to get to the internals of the Glo, and that it uses an SD card for storage internally as well. I swapped the SD card with another card and copied the contents of the old card to the new card. The Glo booted up normally and I can delete/modify files again as usual. So it indeed appears the SD card was somehow broken.
What still puzzles me is the fact that I wasn't getting any errors and that both Finder and Explorer reported the card as empty while it wasn't. I'm guessing the reader was interfering in some way, because when I put my micro SD in my computer directly it *does* alert me that deleting or formatting could not be completed.
Thanks for your help!
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