How can i check for corrupt data

I have a lot of machine embroidery designs stored on my imac and have reason to believe some may have corrupt data which is not evident when opening but has caused major damage to memory board in sewing machine. Is there anyway to scan for corrupt files?

My wifes sewing machine is in for service and repair because a couple of designs in the memory have somehow become too big for the machine to open them so it is not possible to edit or delete them. I sent the designs to brother and their machines developed a problem as well so they had to change the memory board and they can only put it down to a corrupt file even though they can't prove it as virus scans show all clear and the designs work fine on the computer with the sewing software program. Our machine worked fine except for not being able to remove 3 designs. Brother said their machines version number changed and also couldn't remove the designs. I have read that if a file is corrupt, backup software will detect it but again no problem there. I have sent the suspect designs to someone in the US who is going to access the design and see if they can find anything but at the moment I can't get any answers because its never happened before. Any ideas would be greatly appreciated.
Regards
Dennis

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