# Library missing after hard drive disconnection **URL:** \ **Category:** Engine DJ (Mac & PC)\ **Created:** [March 31, 2025, 9:07am UTC](https://community.enginedj.com/t/library-missing-after-hard-drive-disconnection/62941 "2025-03-31T09:07:12Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![D-Wane](https://community.enginedj.com/user_avatar/community.enginedj.com/d-wane/32/16839_2.png) [@D-Wane](https://community.enginedj.com/u/D-Wane)\ **Post date:** [March 31, 2025, 9:07am UTC](https://community.enginedj.com/t/library-missing-after-hard-drive-disconnection/62941/1 "2025-03-31T09:07:12Z")
Hi everyone, I have a Denon Prime 4 and a Windows 10 PC. The Engine library and all my associated .mp3 music are located on the D: hard drive. Recently, I had a login issue with Windows, and I no longer had access to the D: hard drive and therefore to my Engine library. When I launched Engine, nothing appeared in the library; it was completely empty, no more track and cue point. So, I closed the Engine software, but I forgot that the automatic backup option was checked, so it backed me up like that. Now that I got back the access to my D: hard drive and I still don’t have a library displayed in the software. I still have my library with my cue points and other on my Denon Prime 4’s SSD and when I connect it to my PC, my entire Denon Prime 4 library appears in the PC’s Software Engine. However, once I disconnect the Prime 4, there are no more libraries in my Software Engine. With this, the option to transfer from my Prime 4 SSD to my PC is not possible by the sync manager. How can I get back my library from the Software Engine without the Denon Prime 4 connected, knowing that even with the backup the library still empty..? ---
**Author:** ![rcatelli](https://community.enginedj.com/user_avatar/community.enginedj.com/rcatelli/32/7048_2.png) [@rcatelli](https://community.enginedj.com/u/rcatelli)\ **Post date:** [March 31, 2025, 6:37pm UTC](https://community.enginedj.com/t/library-missing-after-hard-drive-disconnection/62941/2 "2025-03-31T18:37:01Z")
That’s weird. Is “d:\engine library” folder present? I would close engine, delete engine folders on _ **c:\users\ {user} \music** _ Starting engine again teorically will find the “d:\engine library” DB’s and show your library. ---
**Author:** ![LAUBE](https://community.enginedj.com/user_avatar/community.enginedj.com/laube/32/16692_2.png) [@LAUBE](https://community.enginedj.com/u/LAUBE)\ **Post date:** [March 31, 2025, 7:58pm UTC](https://community.enginedj.com/t/library-missing-after-hard-drive-disconnection/62941/3 "2025-03-31T19:58:12Z")
> **[Engine DJ | How to move your library to a new computer](https://support.denondj.com/en/support/solutions/articles/69000822782-engine-dj-how-to-move-your-library-to-a-new-computer)** > > If you would like to move your Engine library from one computer to another, you will need to source an external drive with a volume large enough to fit your entire Engine DJ library. Confirm the drive is formatted to FAT32 or exFAT.  First,... ---
**Author:** ![D-Wane](https://community.enginedj.com/user_avatar/community.enginedj.com/d-wane/32/16839_2.png) [@D-Wane](https://community.enginedj.com/u/D-Wane)\ **Post date:** [April 2, 2025, 5:27pm UTC](https://community.enginedj.com/t/library-missing-after-hard-drive-disconnection/62941/4 "2025-04-02T17:27:25Z")
hi, this folder is present yes.. And after so many try, I have nothing ---
**Author:** ![D-Wane](https://community.enginedj.com/user_avatar/community.enginedj.com/d-wane/32/16839_2.png) [@D-Wane](https://community.enginedj.com/u/D-Wane)\ **Post date:** [April 2, 2025, 5:32pm UTC](https://community.enginedj.com/t/library-missing-after-hard-drive-disconnection/62941/5 "2025-04-02T17:32:28Z")
hey, the problem is not that, you didn’t read well, I only have acces to the collection when I connect my denon prime 4 to my computer now, when I disconnect, the collection is gone. And sadly engine can’t synch from the prime 4 to the computer, so I’m stuck and spend hours and hours since one week to find a way. I put the engine library (without the MUSIC folder) from my denon prime 4 to my computer Engine library folder and now my collection appears but in red, I have to find a way to change the path in finding correpondance in my computer for all my 5000 tracks with chat gpt and powershell but that takes hours too and no result. ---
**Author:** ![D-Wane](https://community.enginedj.com/user_avatar/community.enginedj.com/d-wane/32/16839_2.png) [@D-Wane](https://community.enginedj.com/u/D-Wane)\ **Post date:** [April 3, 2025, 5:48am UTC](https://community.enginedj.com/t/library-missing-after-hard-drive-disconnection/62941/6 "2025-04-03T05:48:03Z")
How can I get back my collection from my denon prime 4 ssd if my computer engine library folder doesn’t show it to me in engine software ?