What is an AFM file?

I did, TMRpcm works perfect but TMRpcm and bluetooth (Hardware Serial) don't work together. With Simple SD Audio, bluetooth works perfect but i don't get any sound. Actually, i don't get any sound with standard internet codes too.

My Arduino and Speaker connected or wired well. (I know, because TMRpcm works perfect by itself)

My Micro SD Card Product has a voltage regulator. (5V to 3.3V)

So, I'm trying a little bit more. Thank you.