Good Free Program to do Check Sum on USB stick contents in WIndows

I need to find a good free utility to do a checksum on the contents of a USB stick that has multiple directories and files.  Unpacking a Visio 2013 .ISO (with 7-Zip) to this USB stick and then using to do installs.  Sometimes the USB stick is missing files during install time after made.

I want a utility that can give me a checksum on contents of USB stick made each time to make sure it has all files etc..

Thanks
rdwolfAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

David Johnson, CD, MVPOwnerCommented:
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
rdwolfAuthor Commented:
I tried the md5sums program but it only gives checksums for files in a directory and does not traverse each folder etc.. I looked at command line options and tried wildcards but it only does the files in top level USB drive folder.

Also, this program would give me a list of all files with check sums (if I can get to traverse all folders automatically) but then I need to find a way to tell if the output is the same each time (as I compare two USB sticks made).  I guess I could capture output to a file and then run a Unix like diff command but I am using Windows 7..  Not sure where to get a good free version of that (the pc-tools.net does not list one..

Thanks
0
EirmanChief Operations ManagerCommented:
Sometimes the USB stick is missing files during install time after made.
That shouldn't happen, perhaps your anti-virus is disallowing some files. (I think 7zip has a verify option).

Instead of CRC checking, you could try this free file/folder comparison utility ...
http://winmerge.org/
0
David Johnson, CD, MVPOwnerCommented:
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Windows 7

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.