Has nothing to do with country. Discs are round objects. In the computing sense that’s cds, dvds, etc.
Disks are floppy disks(diskette, “discette” never existed as a word) , hard drive disks… etc. There is a difference and it has nothing to do with what land you’re in. Disk in usa never meant a circular object like a Frisbee (discus for example)
I’m sure you were… But what does that have to do with what they said?