I think (from memory) the tracks that are downloaded have encryption and the Prime players have a unique key to unlock it that is registered to that particular Prime device. Only the player that it was downloaded to would be able to play it back. It’s how most DRM works in software and read it’s how this will work.
Even if the downloaded tracks are copied or swapped, only the registered Prime player will be able to decrypt it.
And let’s not forget that the prime 4 needs 110volts of electrical energy from a wall socket - so that means it’s not ducking standalone either - get over yourself and this monotone pedantic drone of “it’s not standalone if” this, that, the other.
You don’t need a computer connected to it when you are performing on it. So it IS standalone - end of
Not if you are recording the output I.e. your mix. That’s from the audio source and would be (I’m assuming like most DJ software) a wav, which would negate any DRM encryption, which you could then move to another drive and you have your perfect copy (maybe only at a lower true bit rate though as I don’t know what they are being streamed at).
Hi Guys,
The feature to move or copy music between multiple sources is something we are looking into adding in the future. Please be sure to like the post below to help us prioritize future feature development. Thanks!
Great news. Managing the system would be much easier as my Prine 4 will live in a club. No taking the laptop to work to top it up.
Now if only you could password the SSD drive (let’s hope you add that too). This would be good for us that install.
Looks like I best open a feature request 
You shouldn’t be recording anything anyway, strictly speaking. Even music you’ve purchased has copyright restrictions such as “no unauthorized recording, broadcasting etc”.
The music from streaming services would be protected from recording (unless you deliberately skirt around it, which would be illegal).
Remind us all that when WE turn 60, we are still able to perform standalone and not having to rely on a tin that says “Viagra”. 
I just realised that the prime 4 can’t be standalone
After all , it needs a DJ in front of it
Yeah! Of course it’s standalone 100 % -
There won’t be any DRM though if the audio out is recorded, like playing iTunes and then capturing your digital out in Audacity, that’s the point I’m making (which I know is illegal). Being able to record your audio out source onto your USB, then being able to transfer this to another usb would make this really easy to pass a streamed audio file around to other DJ mates if the transfer was allowed.
That said, I’m sure I read on here Denon are planning usb to usb transfers in a future update.
Totally agree.
format it if on windows fat32 first. before installing it.
No, use exFAT. The Database file can easy be bigger than 4GB and FAT32 can’t handle big files above that!