What audio file formats does the PartyBox 310 support via USB?
The PartyBox 310 supports .mp3, .wma, and .wav audio file formats when using a USB storage device. The USB storage device must be formatted in FAT16 or FAT32. The speaker plays audio files from the root folder to the last level of subfolders in alphabetical sequence, with up to 8 levels of subfolders supported. (Page 10 & 15)
From the official Jbl Partybox 310mc Portable Party Speaker manual, page 15
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