delete in progress Time machine file

I solved it by erasing all the disk and the 'inprogress' file was than deleted.

After, I left the same external disk on Automatic Backup for all the night and it worked.

Using automatic Backup during the day, while working is not stable.

Now I'm back to my previous habit to backup every week during the night and it works on a simple backup as I did for multiple years.🙂

Hi macjack, thank you for your quick answer.

This happen twice in the last two months. Erasing the TM disk every time doesn't look like the best solution.

Is this the only one you can advise? What if it comes a third time ?... Thanks.

Thank you again for your help. Unfortunately OldToad suggestions didn't solved either.

I went through the erase disk with disk utility, but found a new partition on top of tree 'Disk2s1' with 32kb that is not accessible and unable to delete it. After erasing my TM partition, all was clear and started the Backup (110GB).

This morning, the Backup was not finished and I had again a inprogress file under the Backup folder.

I tried to erase all partitions creating a new one, but I comes to the same.

I think maybe it is time to change the 5y disk...