They dont need to be in a crate or playlist to see BPM. Once added to core collection BPM, Key etc is available. Just click on collection (it will include all songs - crated and non crated)
PS - Not applicable to folder browsing though which is the original feature request.
Ok, this is the feedback I’ve been seeking this whole time, and from your response it sounds like it is not possible. If the workaround is to add everything I have to the Collection, I can try that, but I know Denon has said they do not recommend over 50,000 tracks (or maybe it was even less than that). Sounds like adding a BPM column to the folder/file browser should be a feature request?
i just read about people adding 4tb internal ssds inside their p4. i only am using 460 gb. but have 26k files. is there really a file limit? and did the latest firmware as of jan 7, 2020 fix this. sorry just unpacked my p4 an hour ago. and im trying to do exactly that the guy above is mentioning. and ALL dj software shows the bpm, etc.
Definitely: yes! Denon Prime 4 is a damn good standalone controller, but I really miss this feature.
Any news on allowing users to customize what they see in the file explorer view on the Prime 4? I need to see BPM, Key, etc
As already explained, that info will be shown once your tracks are added to the database/collection and analysed. That’s how the system works.
As OP explained clearly nearly 2 years ago, this is not the case with the FILE explorer - a very simple feature that would make it endlessly easier.
As the name suggests, it’s just a file explorer - not the main library.
DJ software works the same way. You have to add the tracks to your library, then use the library to browse.
a very simple feature that would make it endlessly easier.
Here is where Denon fails over and over.
Wow this is an old topic! 
Yeah, bottom line with the Prime is that you need to have everything already imported to your Collection before you can see track BPMs and even then they will not display on the File view. Because there is no way to analyze folders directly on the Prime 4, it really does not do well as a controller for DJs who improvise, say with USB drives with music you just downloaded (or a friend coming over with their USB to jam on your system), or with massive music libraries that aren’t fully imported to Engine Prime. It is really intended for like wedding DJs, as well as those performing DJs who plan everything out in advance and have everything in a Collection or crate already and don’t really deviate during their set. I personally had to go back to using Traktor and my previous controllers to reclaim the kind of flexibility I needed with my sets, but I did keep the Prime 4 and I still use it occasionally for live performances with fixed playlists.
Not necessarily true - in Traktor Pro for instance, you can attach any external drive you want, browse to it and manually analyze one its folders - displaying all of its associated metadata in that File browser view - without adding it to your Collection. A Collection (whether Prime’s or Traktor’s) just keeps that analysis data permanently in its linked database, which of course makes things more convenient if you frequently replay the same material, but isn’t as useful for constantly evolving libraries and spur-of-the-moment drive swaps and guest DJs.
The fact that OP has had to navigate to a completely different platform is evidence enough that this almost insignificant feature (effort wise) would have more than marginal returns with regards to usability.
As has been previously stated, this was requested over 2 years ago, and all it requires is you mimic the same interface as the playlist view to the file explorer view.
Please read and seriously consider, Denon. It even allows users who are coming from other platforms to be able to jump right onto denon gear with ease, increasing the ease with which pioneer DJs can move to your platform.
That’s bc Traktor is well designed. The same way Prime4 can read the title tag, can read all other tags and show on browser. But someone at Denon doesn’t like give user so basic features and chain us to a Windows 1.0 file explorer. My chinesse 20bucs mp3 player has more options. 
That works perfectly… but I have 1500 folders on my music disk (I don’t have full albums at all, mostly 1-5 songs per folder) I did first 200 or some folders: Just select folder → select file, ctrl+a if more than one, right click ‘add to library’
Honestly, I just can’t, my arm is numb… 
isn’t there any “add music folder/drive” and ‘add all to library’ (including subdirectories, option? 
Also friend wanted to try that dj board, he had hundreds of folders, it would have took too long to scan folder by folder so he couldn’t do anything else that trust memory to select similar songs
Any idea what to do?
What happens when you drag the main folder?
Music > Folder 1
Or drag the drive itself?
Oh, looks like that does a lot something on harddrive. ill see tomorrow did it work out ^^
…Should have bought USB SSD drive… this one is so slow 
Yes. Reorganise.
Having so many folders with a tiny amount of files in each seems a really odd bizarre way of doing things.
Like rather than having one drawer with all your socks in, you’ve got separate drawers for each pair of socks. 
Just make a small number of folders and put maybe 500-1000 tracks in each. It doesn’t matter what the folders are called, or which tracks are in them. The database does the organizing.
Well, im using foobar to play those, so they are sorted like genre / artist / album / song name.mp3
of course I could remove genre, but it would be just small help.
sorry, I just cant have random artists on same folder, unless its collection, sounds too chaotic to me
actually now that im thinking, your example was bit chaotic? isnt it?
For example I have my camera photos sorted by j:/year/month/day/place/ structure (32k pictures only, stopped photographing 10 years ago) how to search if I would want to find picture from 2008 trip to thailand or 2005 crete? having all in 5-10 massive folders wont help at all (until there is an AI that can do sorting by context ><
edit, normally I use foobar, ofcourse I could just copy everything on second disk and use that only with dj-deck… mmm, would have been easier. but that engine DJ would have been reading that directrory long time before I can press ctrl + a
Right make one playlist called master. Add all tracks to that playlist and analyze the lot overnight. Organise by artist. Highlight those tracks. Make up your playlists and drag tracks in. Long winded maybe but you will have one master folder that you can at least work with
Where does Foobar place all the subfolders? My Music or somewhere else
Drag the parent folder and Engine will create everything