DJ Library Backup: The 3-2-1 Rule Against a Set Disaster
· re:union Radio editorial · 3 min read
A dead USB stick before a gig doesn't have to be a catastrophe. Here's how to properly back up your DJ library using the proven 3-2-1 rule to prevent data loss.
A defective USB stick right before the gig is every DJ's nightmare: cue points gone, playlists gone, and in the worst case, half your prep work wasted. Anyone who backs up their library according to a clear system will still be behind the decks when a drive fails instead of staring at a blank screen.
At a glance
- The 3-2-1 rule: three copies of your data, on two different storage types, at least one of them offsite
- You must back up not just the music folder, but also the DJ software's database folder
- Rekordbox version 6.5.3 and up offers a dedicated Device Library Backup function for USB sticks
The 3-2-1 Rule: Simple but Effective
The principle behind it is simple: three copies of critical data, spread across two different storage media, with at least one copy stored at a different location. Digital DJ Tips outlines a practical example: the master copy lives on the DJ computer, a second copy sits on an external hard drive kept separate from the computer, and a third copy resides at a completely different location. Sticking to this consistently slashes the risk of total loss significantly.
Crucially, it's not just the music folder that needs backing up, but also the DJ software's database folder, usually found in the Music or Documents directory. That's where playlists, cue points, and track positions live—hours of prep time represented in data.
Rekordbox: Device Library Backup for USB Sticks
For USB sticks plugged into CDJs, Rekordbox has offered a dedicated Device Library Backup function since version 6.5.3. It backs up the so-called Device Library: the analyzed info like BPM, key, and waveforms plus management data like cues and loops. The music files themselves are not backed up—for a restore, the original files must still exist on the computer or in the cloud.
Automatic backup on eject can be toggled per stick, and manual backup can be triggered anytime for any connected stick. The backup can be saved locally on your PC or Mac, or—with Cloud Library Sync enabled via a Dropbox account—additionally in the cloud. Note that this feature is only available to Professional plan subscribers and runs on macOS and Windows.
Cloud as the Third Copy
For the offsite copy in the 3-2-1 rule, generic cloud services like Dropbox or Google Drive are sufficient, according to Digital DJ Tips. With a database shared across multiple computers, however, caution is advised: not every setup is suited for sync folders. If you're after a dedicated solution, Digital DJ Tips points to My DJ Cloud as a specialized, subscription-based backup service.
FAQ
Is a second USB stick enough as a backup?
Not as your only safety net under the 3-2-1 rule, because two USB sticks count as a single storage type. The smarter combo is computer, external media, and an additional copy at a different location.
What exactly does the Rekordbox Device Library Backup save?
Only the USB stick's management data—think BPM, key, and waveform analyses plus cues and loops. The music files themselves aren't included and must be available separately.
More on booth prep in our piece on Hot Cues, Slip Mode, and Beat Jump and harmonic mixing with the Camelot Wheel.
Source: Digital DJ Tips, Rekordbox Device Library Backup Guide.
