My Nikon sdhc memory card is showing in my computer, but after a few minutes it disappears from the file system. The three things I tried are:

  1. formatted the card
  2. changed my card reader
  3. changed the used USB Port

None of the things above helped with the problem. What could be wrong and how do I prevent it?

  • \$\begingroup\$ What operating system are you on and what exact card are you using ? \$\endgroup\$ Commented Jun 4, 2014 at 13:15
  • \$\begingroup\$ This question appears to be off-topic because it is about general computing hardware problems that are indifferent to photography. It may be answerable here, but is probably a much better fit for SuperUser. \$\endgroup\$
    – AJ Henderson
    Commented Jun 4, 2014 at 14:51
  • 2
    \$\begingroup\$ If my guess is right — that it's photo workflow software that is to blame — I think it's not quite a general problem and would be fine here. \$\endgroup\$
    – mattdm
    Commented Jun 4, 2014 at 16:21

1 Answer 1


You don't say what operating system or software you are using, but here is my suspicion: some program is configured to detect the insertion of a memory card and to look on that card for new images to import. When you insert the card, it does this, and then automatically unmounts the card so it can be safely removed.

If you don't want this, you can probably find the offending program and configure it to not run on card insertion. Alternatively, you could leave that feature active but see if the software has a configuration options to disable unmounting after import.


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