sync a YT playlist to a Sandisk MP3 player.
tested with a 'Sandisk Clip Sport Go' aka SDMX30
Usage: sandisk-sync.sh [options] [YT playlist ID]
-c file config file ($HOME/.config/sandisk-sync)
-d toggle download new files (1)
-h help
-p dir dir Sandisk player is mounted (/media/$USER/SPORT GO)
-r toggle sync Voice Recordings from player (1)
-s toggle sync new files to player (1)