I have a new Clip Sport Plus.
It does not play FLAC files.
The support document at https://kb.sandisk.com/app/answers/detail/a_id/14130 clearly indicates that the Clip Sport Plus supports FLAC as my previous SanDisk players did.
I get a “filetype unsupported” error when I try to play FLAC files that worked on other SanDisk players. I checked the sample rate, bit rate, and bits per sample of my files. I even downloaded a test file that meets the specifications exactly.
My new Clip Sport Plus had the latest firmware but I downloaded 2.12 anyway and updated. The about page shows 2.12B.
How do I get the device to frecognize FLAC files?