Thank you for the speedy reply.
My o/s is Windows 7 32-bit (I think it is the professional version). The external drive is Seagate Goflex Desk Adapter USB3.0. I did check Seagate's site and they have nothing about my problem. I did downloaded .msg file. (I really don't like to install software that takes over things I do myself. I reformat my computer regularly to get rid of that type of software.) Anyway, I was not able to run the .msg file. I found an .exe on the link so I installed that but could not get anything to run, just like the person in that post (although my problem is different), however, I see the drive and I can copy files to it, I just can't modify them. I have tried to contact Seagate but the serial number is so small, I cannot read it and you can't email them without it plus no one will be in until next week.
I can't wait to call Seagate on Monday because the warranty expires Sunday. I will see if I can find the receipt now. It is my fault that I did not discover this problem earlier.