How do I upload copied levels in Geometry Dash?

Solution 1:

Several things to check:

1. You need to verify the level first by playing it yourself. I don't think you need to complete it, because I have seen levels that are incomplete (some just drop off and you have about 30 seconds of nothing; and others that are just impossible to finish due to a block being out of place, etc)
2. Try upgrading to the latest version. Some changes in the versions will not allow you to upload a level if you are using an earlier version.
3. Make sure you are connected to the internet (that's an obvious one).
4. Make sure your profile hasn't been banned. There are several reasons why users can be banned, and this will stop you from being able to upload levels.
5. File size may contribute to this issue. If a file is too large, the servers will reject it. Reduce the length of the level, or try trimming some blocks etc. to reduce the file size, and try again.