MD5

I have folders I would like to track with an MD5 program. They contain a very large number of files and some of those files will be updated periodically. At this point I have to make a whole new checksum file every time I update files. I would like to know if there is a program that will allow me to create a checksum for thousands of files, then when I need to change a few of them, delete only those old hashes from the changed files, and then add new hashes for the changed files to the preexisting hashfile. This way I would always have only one md5 file to check for each hard drive.

Anyone have any suggestions?

Thanks

I've actually already tried that one. It only lets me create an hash for one file. I have a few that will let me create one checksum file with hashes for thousands of files, but the problem is that if I create one checksum file for 10,000 media files and then change one media file, I have to create a whole new checksum file for 10,000 media files just to include that one media file. I would much rather be able to just delete the hash for that one media file and then add to the checksum file the new hash for that media file after it's changed.

Thanks for trying crispy. I appreciate it.

I might not be explaining this very well. For anyone familiar with 7zip: what I want is something similar to 7zip's ability to add and delete files from an archive after you have alread zipped them. So if you zip 10 files together, you can delete one from the archive. You can also add a new file to the archive. You are still able to constantly have one file. You don't have to uncompress and recompress everytime you want to make a change.

That's what I'm looking for. Only I want conrol over hashes within a checksum file, as opposed to zipped files in a 7z archive.

I've even tried the "Hashcheck" program recommended in these forums, but it did not let me change anything within the checksum file. It comes down to two possible actions. 1) Create a checksum file. 2) Verify files based on the checksum file you created. I need to change that checksum file. It just hasn't been an option on any of the 10+ programs I have tried so far.

I found a program called ExactFile. It seems to be fast and it works well with Windows 7. It also produces a text editor friendly checksum file. So all I have to do is work with the text inside that file to delete the hashes and file names for the files I am altering. Then I create a new checksum file for the files I altered, copy the info from that checksum file and put it into the old checksum file. Then all of my files are still accounted for, but I don't have to make a new checksum for all of my files every time I change even one.