Simplayer is just a music playing app.
Folder music of, to play in random, (a song playing, not sequentially playback is supported)
Good music youre listening to right now, and copy it to another folder, you can hear separately.
After added, old music, please immediately removed along with the folder.
You can put in Simplayer through installed iTunes music files on my PC / MAC.
Music files are not backed up to iCloud, it does not affect the iCoud capacity.
Do you have music files that are sleeping on my PC?
Please try to listen to install immediately.