#7. "RE: D3100 "This Memory Card Cannot Be Used"" In response to In response to 6
Your right PNY (pronounced Penny) is a discount brand, the also make system RAM.
They are mostly sold at places such as Staples, OfficeMax and Office Depot (office supplies).
Never have felt they were reputable.
SanDisk, or Kodak , Transcend all good brands.
I would get pictures of of those PNY cards ASP, and get some SanDisk or Transcend cards and transfer to them if its even possible. OR dump the picture on to your computer for safekeeping and start new.