Hello All,
Today, I decided to perform a routine incremental backup of my main desktop computer with the latest version of Acronis True Image 2018, 22.5.1 0640.
Midway through the backup, a popup window advised me that my 4TB USB external drive was full. I would need to delete something if I wanted to continue. I tried to simply open the drive via (Windows) File Explorer but couldn't. I needed administrative approval. I attempted to over-ride but failed. I rebooted the machine, tried anew and was again presented with a screen asking for administrative approval. Again, attempts to over-ride failed.
Finally, I opened TI and navigated to the Active Protection icon. It is the fifth icon down on the TI main screen. It looks like a shield. Once that I moved the slider from Active Protection Is On to Active Protection Is Off, I was able to delete some older backup files and complete the current ones.
I'm posting my experience lest anyone else find themselves in a similar situation.
Ralph Sutter