I also use a USB extension cable to charge the A10. Don't want to chance damaging the USB port which seems rather fragile.
Access to files is so slow through the Sony via USB that I always take out the microSD card and use a microSD -> SD adapter to access the files via a laptop.
There was one instance where during recording, the A10 thought it was full and stopped recording. Had to restart the device to be able to restart recording, and a few songs were not recorded in the meantime. That was using the device's internal memory recording to 24/96. It hadn't been formatted since a couple recordings prior to that, I'm not sure if it got confused or what, there was still plenty of free space available.
Now I always use a Sandisk Extreme PRO microSD card and format it on the device before every recording to minimize the chance of that happening again.
It’s also a good idea after downloading recorded files from the internal memory to always format it rather than simply trashing the contents.
Yeah, I'll do that going forward if I ever use the internal memory again in the future. I've wiped it regardless, but it'll sit empty in favor of the microSD card.