dfpr

you might be sure it is not ccleaner fault but I was under the impression that this is the right place to submit a bug report. Be certain that I have made all the tests before trying to get some help and I wouldn't be wasting your time if I wasn't sure it is ccleaner the source of the issue. The drive being encrypted or not makes not difference, like a said several times I have no other software that is zeroing out the files. If you can't or don't want to fix the bug then it's fine, I'll look for another program, goodbye.

It is set to NORMAL and FASTER, it is in the same line

I know because it was talking a very long time so I forced quit CC and saw the files contained zeroes up to some point. It's definitely an issue since files sum up to hundred of gygabytes being slowly and unnecessarily zeroed. I don't have any other software that could be doing that.

Sorry if I wasn't clear, I don't expect Ccleaner to write zeroes into the duplicated files before deleting them, I have not enabled such thing and I don't know if it is normal, I expect Ccleaner to just delete the files without delay. I'm running Windows 11 and it's an external usb3 gpt encrypted(bitlocker) ntfs 4tb hdd drive.

I'm running version 6.16.10662. Options -> Settings -> Secure Deletion is set at 'Faster'. Is wiping/zeroing contents before deleting files selected for deletion in the duplicate finder normal??