I tried Rockbox again, and it remained difficult to deal with. I added a Readability theme, and couldn’t locate it. Sometimes it would tell me to reboot. At least once, it rebooted back to the Sansa look.
You need to reboot to enable some features, just do so when prompted. You’ll reboot into the Sandisk firmware if you plugin in the USB cable so that you can use USB. This is exepected. Really, take a look at the getting started section, its only a few hundred words and it would help you immensely here.
It still wouldn’t recognize my AAC HE files.
Rockbox doesn’t “recongize” AAC-He files, it just plays them. If you have AAC-HE files, just put them on the player, select one and then play it. Simple at that.
Rockbox needs to be easier (for me anyway) to be successful. It is more stubborn that Linux.
Nonsense. I use both pretty regularly. The things you mention, playing files and changing themes are trivial. And if for some reason you can’t figure them out intuitively, the manual explains the steps quite clearly IMO.