The problem is most likely the SSD card itself. Those things are unreliable and really only good for general data storage.
With an image file, only use USB pendrives or regular hard disks.
I have a 250GB SSD card and it proved to be unreliable with image files but has been great with regular files. Unknown why but SSD cards in general will have an issue or two.
Sometimes, if you got a CD that came with the SSD card, you may need to install the driver suite that is on it. You may also check with the SSD card maker's web site to see if there is a firmware update.
Personally, I wouldn't trust a SSD card for anything other than to use for emergency backups. Use a regular hard disk or USB pendrive instead.