I copied a 60 Mbyte image to my CD-RW, which is using the build-in IDE interface, not a USB cable. It took about 60 seconds to copy. I opened the 60 Mbyte image in Irfan View. It took 3272 milliseconds to load - about three seconds. I then loaded the file from the CD-RW drive. It took 51231 milliseconds or about 51 seconds. This is with preview turned off. If preview was on, it would have to load the file into memory, resize it to preview size. This takes about five seconds from the hard disk, but just over a minute from the CD-RW drive. If you are using USB these times might be much larger.
The solution is to turn off preview, or just be prepared to wait for the software to do its job. I suspect that there is nothing much wrong.