I successfully erased this disk using Macintosh OS X Extended (Journaled) Format with Apple Partition Map. See the image. Oh, and notice the grammar error in Apple's little warning statement. I hope that their programmers are better than their writers.
Of course, the disk can be reformatted using other formats.
In my experience, Castlewood Orb Disks can sometimes be unreliable.
After some frustration, I went back to using Zip Disks. Anyway, I'm
offering this disk as-is, without any guarantee.
Different computers and different monitors have different characteristics, and might display colors differently. Therefore, the colors of this item as they appear on your monitor might not be exactly the same as the actual colors of the real item offered for sale.