Hello,
I've been storing all my music in the default Dropbox local folder named "Music" for a while now.

Regrettably, this folder hasn't been synced with my Dropbox online folder yet.
Now, I wish to completely sync this "Music" folder to Dropbox online.

The "Music" folder already exists online in my Dropbox, but it currently contains either no songs or just a few.
I'm concerned that initiating the sync to Dropbox might result in the removal of all local (sub) folders and music files since they don't exist in Dropbox Online.
Could anyone guide me on the correct steps to sync the local Dropbox folder ("Music") to Dropbox Online?
Note: My local Dropbox folder (Music) has numerous subfolders (genres and subgenres), and the entire folder size is over 500 GB. Therefore, dragging and dropping via a web browser isn't feasible due to the maximum upload limit, which I believe is 50 GB(?).
Thank you.