Sansa Clip Sport Empty Playlist Windows 10

SanDisk MP3 players SanDisk® Clip Sport
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Maybe take a look at this recent discussion in the SanDisk Forum.  The proposed solution describes how to use Windows Media Player to create playlists on SanDisk audio players.

     https://forums.sandisk.com/t5/SanDisk-Clip-Sport-Plus/M3U-playlist-empty/m-p/364455/highlight/true#M332

AND

Here is a link to another discussion in the SanDisk Forum.  The proposed solution describes how to use a Batch File Command to create a playlist of a collection of subfolders under Music on SanDisk audio players.

    https://forums.sandisk.com/t5/SanDisk-Clip-Sport/Simple-Batch-File-for-Playlist-of-Genre-Folders/m-p/359406