Here’s a post I found that may help people get the media they want in the Memorex packaging:
"If the spindle is dark black and shiny with no white foam spacers then this is a RICOHJPNR01. The top paper on this one that says â€œAttention 2.4x ownersâ€¦â€ has a small hole with the size of the spindle. This one has a table with the recording time and the quality instead of graph bars.
If the spindle is black, semi shiny and no white foam spacers and the top paper has bigger then the spindle whole this is RITEK R02. The recording time diagramâ€™s bars on the side are red.
If the spindle has a uplift edges, spindle is not shiny at all and not exactly black, has white foam spacers then this should be CMC media. The recording time diagramâ€™s bars on the side are purple."