Hi guys
I have a Kobo Glo circa 2012. For the basic function of just reading, I love it

and have no requirement for any type of upgrade. I can still read on it no problem but can't connect via USB any longer as I think the port on the device is broken.
As I sideload my books from Calibre this is obviously a problem. However, last year when this happened I got some advice from some lovely folks on this forum and started to use the content server wireless connection feature. Great. With using an SD card as an optional extra.
Now, a couple of weeks ago the download feature on the Kobo via the content server wireless connection feature stopped working

.
I can connect and see the books available in my library, or change to another library (I have multiples in my Calibre)
and I can press the epub button which then brings up the "File Download" button but when I click the continue button, the download box opens but then closes real quick and then nothing else happens.
It used to then show the download as complete and then ask me if I wanted to open the file or not.
Ok, so I still have a micro SD card to use, so I did. A few times, no problem.
Then, all of a sudden yesterday, after using the card to upload a book a couple of days before, I got a message on the Kobo telling me that it couldn't read the card.

Then after a few times of removing and reinserting it with nothing happening other than the screen flashing, it now tells me to reformat the card to FAT32 (it is 1GB FAT16).

. That's after about a year of no issues. The card works fine for me to transfer books from Calibre (my laptop) onto, but won't then transfer them over to the Kobo.
Can anyone offer any advice please?
I have ordered a new SD card so hopefully this solves that
issue, but am losing my mind over this. It would be one thing If I couldn't read anything on the device, but to be able to read stuff but not be able to load on content of my own in a format of my choice is beyond frustrating!

And I'm not in a position to buy a new device even if I wanted to.