joseph Hi Joseph, It’s really easy to do what you want, just go to settings on your main device and scroll down to Backups , then create a full backup and name it.
This backup is normally created in your ST3 Folder, to get to this folder while still in settings scroll a bit further down to Info, then select Show Stage Traxx 3 files, this will open the ST3 Folder where all the songs reside plus the backup files , to find your backup file easier go to top right circular blue icon with 3 dots, select it and choose List and Date option , this will place your newly added backup file in the front of your list, long press this full backup file and choose share, then airdrop the file to your new device, make sure your new device is near by and airdrop enabled, once your new device has received the full backup it will ask you where to put it, choose ST3 folder and save it there, now open ST3 on new device, go to settings and restore from this full backup file and you are done, you have an identical duplicate on both devices, I always only change or update one device I regard as my main device and always use this device to update all my other devices to keep them relatively in sync otherwise thing’s can get confusing and out of hand.
I believe new updates will change this where all devices will sync up automatically via iCloud just like notepad and diary are at the moment, this will definitely make life much easier.
Cheers Damir