Why won’t Serato analyze some of your files?
When a track refuses to analyze, shows a gold lock, or lands in Serato’s problem-files list, the cause is almost always one of four things: the file is read-only, it sits on a drive Serato cannot write to, it is not valid audio, or it is too large. Work through them in order and each has a clean fix. Here is how to isolate the failing files and clear each cause, plus the fastest way to find every problem file at once.
Fix files that will not analyze
- Find which files failedAfter an analysis run, Serato flags the ones it could not read as problem files. Sort or filter to isolate them so you are working on a short list, not the whole library.
- Check file and folder permissionsA gold lock icon means the file is read-only, so Serato cannot write analysis data back. On Mac, run Disk Utility First Aid on the drive and clear any read-only flag on the folder.
- Check the drive formatmacOS reads and writes APFS, Mac OS Extended and exFAT. It cannot write to an NTFS drive without extra software, which blocks Serato from storing analysis.
- Confirm the file is really audioA file with the wrong extension, or one that is actually corrupt, cannot be analyzed. Try playing it in another app; if it will not play there either, the file is the problem.
- Check the file sizeSerato does not support files 2GB or larger. An oversized file, often a very long mix or a WAV, will refuse to analyze.
- Re-encode, then re-analyzeFor a genuinely broken file, re-download it or convert it to a clean MP3 or AIFF in another app, replace it, then drag it onto the Analyze button again.
The gold lock: a read-only file
By far the most common cause is permissions. If a track shows a gold padlock, the file is read-only, and analysis (like cues and beatgrids) has to be written back to the file, so Serato simply cannot store the result. This is why files sometimes appear to analyze but revert the moment you reload them: the data had nowhere to go.
The fix is to make the files writable. On a Mac, run Disk Utility → First Aid on the drive, and check the folder holding the music is not marked read-only in its Get Info panel. Once the files are writable, re-analyze and the results stick.
The drive Serato cannot write to
A whole folder of tracks that will not analyze often points at the drive, not the files. macOS can write to APFS, Mac OS Extended and exFAT drives, but a drive formatted NTFS (common on drives that came from a PC) is read-only on a Mac unless you install extra software. Serato cannot store analysis on a drive it cannot write to. Copy the music to a Mac-writable drive, or reformat the drive after backing it up. If you run your library from an external drive, see how to set up a Serato library on an external hard drive.
The file is not really valid audio
Sometimes the file itself is the problem. A download that finished with the wrong extension, or a partly corrupt file, will fail analysis every time. The quick test is to play it in another app such as the Music app or VLC. If it will not play there either, the file is broken, not Serato. Re-download or re-encode it. Corrupt files are worth taking seriously because one can drop out mid-set; the related fix is dealing with corruption in your Serato database. If a bad file crashes Serato outright rather than failing to analyze, see why Serato keeps crashing or freezing.
The file is too big
Serato does not support audio files 2GB or larger. That mostly bites full DJ-mix recordings and long uncompressed WAVs. Compress the file to a high-bitrate MP3 or AIFF, or split it, and it will analyze normally.
Find every problem file in one pass
The frustrating part is that Serato only reveals a problem file when it tries to analyze or load it, so you find them one at a time, sometimes at the worst moment. Crate Cleaner scans your entire Serato library and lists corrupt and unreadable files as one signal in its health score, so you get the full list up front and can fix or replace them before a gig instead of after. It runs on your real library on macOS, with a free plan and no card required. Before a set, Pre-Gig Check runs the same check against the crate you are about to play and treats a corrupt file as a blocker.
Try Crate Cleaner free → · See pricing →
FAQ
Why does Serato show a gold lock on some tracks? The gold lock means the file is read-only, so Serato cannot save analysis, cues or beatgrids back to it. Clear the read-only flag on the file or its folder, and repair drive permissions, then re-analyze.
Why do my files analyze but not stay analyzed? Serato is unable to write the results back, almost always a permissions or read-only issue, or a file on a drive it cannot write to. Fix the permissions and the analysis will stick.
Does Serato have a file size limit? Yes. Serato does not support audio files that are 2GB or larger, so very long recordings or large WAVs can fail to analyze. Split or compress them and try again.
Is there a faster way to find every problem file? Yes. Crate Cleaner scans your whole Serato library and lists corrupt and unreadable files as part of its health score, so you get the complete list in one pass instead of discovering them one deck-load at a time.
Find every problem file up front
Crate Cleaner lists every corrupt and unreadable file in your Serato library in one read-only scan. Free plan on your real library.