EXPANSYS Memory 512MB Secure Digital Card – Support Forum

512 mb only showing 488 mb available [EXPANSYS Memory 512MB Secure Digital Card - 103427]

  • AndyS
  • Posts: 15
  • Join Date: 25 August 2004
I've just received a 512mb storage card, when I put this is my Ipaq 4150, it shows 488.25 mb available, 0.00mb in use. I've tried formatting the card but it doesn't make any difference. Any idea what has happened to the other 30 mb? Thanks
  • AndyS
  • Posts: 15
  • Join Date: 25 August 2004
Just to add, I've checked my 256 mb card and this only shows 243.13 mb
  • proctog
  • Posts: 7
  • Join Date: 12 October 2004
I've just received a 512Mb SD card as well, and it shows 488Mb free in a Palm. It's probably due to the different definitions of storage capacity that hard drive manufacturers use; they use multipliers of 1000 for G/M/K whereas everyone else uses 1024. So a "512" card by their definition has 512 * 1000 * 1000 = 512000000 bytes. Obviously our devices are using the (correct IMO) value of 1024, giving 512000000/(1024*1024) = lo and behold 488.28Mb. Glenn.
  • Mik
  • Posts: 4635
  • Join Date: 28 June 2004
This is indeed correct Proctog. thanks for the explaination. -- Mick - eXpansys
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