Ok, I wonder if this is correct, but I manually deleted these 2 NVIDIA archives in the "BackupStorage" folder. I did another scan and updated the Nvidia high definition audio driver 1.3.39.4. CCleaner performed the update, but did not save it: I still see the 1.3.39.3 archive in the "BackupStorage" folder. Anyway, CCleaner still offers version 516.93 and not 516.94 from the Nvidia Geforce site for the video driver, but it doesn't seem to download a Nvidia driver again for the moment.
The "BackupStorage" folder is now 2.4 MB, which is more reasonable.
If I summarize, it seems to me that CCleaner has the following small problems:
- Archiving of one or more driver versions not installed on the system,
- Picking up a driver that has nothing to do with the user's choice or even CCleaner's proposal,
- Deploying an archive that is then abandoned during processing,
- Not cleaning several different backed up versions of the video driver.