ETC APEX - Server, backup with clients. Software: 3.3.4.21.

Enoying fault when we save our shows. Warning messages 'EOS "Save failed, unable to write to persistent storage" error.'

We need to go to server/backup and click to continue. Since we have an APEX in the auditorium, it will be a bit of a run up to server/backup when we save our showfiles.

We have received tips before that there may be something wrong with the file and have tested loading only parts of the file to see if there is any part that needs to be redone.

If we only select one of the yellow ones, we will not get the error message when we save. If we select one of the unselected ones, we will get the error when we save. It doesn't matter if it's 1st, 4th or all. 

Any tips on how to get rid of this or avoid having to press "continue" on server/backup?

We've had this on several versions before, so it's nothing new for 3.3.4.21. We've just tried to understand what's wrong again.