Question about my CD player

[Feanor]

My own experience, (with a limited number of devices), is that CD players, DVD/Blu-ray players, "smart" TVs, etc., have a limited ability to handle data CDs (such as you created), OR flash drives and/or hard drives (via USB connection), and are often stymied by folders and always by complex directory structures -- my most recent disappointment was with our new Samsung "smart" TV. They are simply not a smart as computers.

Actual computers are the best media servers, IMO. Other than that, media servers of various kinds can work very will too but, of course, you must use one of a type that doesn't require a TV screen to select and control your playback choices. Portable devices such as music players or smartphones will generally handle MP3's pretty well. There are also more up-market choices; an example is the Sony HAP-Z1ES which has had good reviews, see HERE.