Sometimes when trying to upload an mp3 file, you get an error message that just says that the file won't upload. Most likely this is because of an issue that is very hard to spot as a user – the file has corrupted metadata, and probably it's the playtime info that needs to be corrected.
This is different than when you get an error message saying that the file is of the wrong type. Then the fix could be as simple as changing "MP3" (uppercase) to "mp3" (lowercase) and trying again.
The bad thing is that these more or less broken mp3-files are really common – the good thing is that we can point you to an easy fix even if it's outside the Video Studio tool.
Fixing an mp3 file with broken information
1. Go to MP3 Repair on this link.
2. Drag and drop the file you want to repair to this upload area or click it to open a file dialog, locate the file and upload it that way.
3. Upload the file by clicking the orange button that has your filename in it. As pictured.
4. Wait for the file to upload. When it is completed, you can play it from the tool if you want to make sure that it uploaded correctly.
5. Use the settings in the image, check the box "Repair audio length (playtime)" and then click "Repair/Edit your MP3 file now".
6. The fix should complete in almost no time, and then this tool often finds itself changing the language of the UI to German. So you want to click the button (as in the image below) that says "Deine neue MP3-datei hierunterladen" which means "Download your new MP3 file here".
7. The fixed file then downloads to your computer for you to use in Video Studio.