Multiple syncs should work.

Manually copying will allow playing of files. You may end up without Artwork and Play History will be missing.

Will syncing this way allow me to run it this way over several attempts? As I have 430GB of music to sync to my phone. As it seems a fairly slow process.

Would it still play music if I simply copy & pasted all of the music over?

Did you select any content to be synced. You need to add something to be synced for sync to sync it: https://www.mediamonkey.com/wiki/index. ... oid_device

Okay, I am pulling what little hair I have left out. I have set MMW to sync to my Samsung Galaxy A10 three times, and it says it's added them all. Except when I check my phone, nada. Now the chances are very high I am doing it wrong. On the left hand side panel my phone shows up, with the SDCard, right click and AutoSync and away it goes...to nothing. So, can someone please point me how to correctly get my music on my phone before I go completely Stir Crazy (great film btw). Thank you.