AllSync & AllDup

Appears that in fact, you have done a Similar Pictures compare, with aHash (99%)? First I compared file content byte by byte, but comparing 10000 similar files took too long. After a few hours I stopped. I used similar pictures compare. 99% because the video was compressed and the frames could diff...

There are 10000 video frames in .bmp (lossless) - Many of them are 100% identical, compared byte by byte. (the video was converted by someone from low framerate to high - from about 5fps to 25fps). I want to delete all duplicates from the same group except the first frame. On the example screenshot ...

This method works PERFECTLY. First I selected the largest folders to compare on both drives, selected all on the old backup drive, deleted them. What remained I moved to a new folder. Then compared again all folders, because the same files could be moved since the backup. When the operation finished...

I had a drive for backup, but it became too small. I bought a new drive and made a new full backup there. Now, I want to compare byte by byte all files, all folders on the original drive and the old backup drive, because I could delete a file by mistake on the original drive. It may take hours or ev...

It doesn't work this way, to compare only files in two various root (base) folders. Also files in the same root folder are listed, if they have no duplicates in the current folder. I think it is impossible in AllDup to compare two backups only, no files from the same root folder. The files in orange...

Easier to say, I want to copy all files from backup to a new folder. Let's name it D:\files_new
Copy all files from backup there
Find all files in D:\files that are different than D:\files_new
and all files in files_new that are different than D:\files
but only in the same subfolders.

I have a folder with subfolders and thousands of files on one hard disk, and its backup on another drive. Paths to the base folders are D:\files and E:\files_bkup. The folder structure on both drives is the same. I select these two folders with subfolders for search What should I select to display u...