I’ve had a few SD card trouble of late and have upgrade to a new set of SD cards (named brands 8GB and 10mps ie decent cards), No problems in the Canon but the cards with Pentax files have played up, on two occasions the files where not deleted by Picasa as I uploaded. No real problem I could clear the the photos in the camera. Then I uploaded a few photos and was looking at them in picasa on my laptop and picasa refreshed the screen, but the new folder had disappeared! Really disappeared! No amount of search the recycle bin or scanning for the photo file names of just recent files could locate them.
So I decided to run a disk recovery utility but it had been a long time since I had had to used such a utility and it was nowhere to be found on my computer or useful photo tools USB key. Also I had forgotten the name (which is recuva, remember that name) so I had to do a little search back into my blog and then check on-line, recuva still has a free downloadable version. Just 4mb, so I had it downloaded and recovered the files in just a few minutes. The two things that are important to note are. Firstly recover the files to a different disk (not the SD card). Second Recuva will not see the RAW files if you just ask to recover photos (it will however recover the .jpeg files). So it is important to recover all files. So I will make sure I keep an up to date copy of recuva on my useful photo utility toolkit
I’m a bit puzzled by the loss of files within picasa, this has never happened to me before. As a precaution I’ve also reformatted the SD cards in the camera I will be using the cards in and not swapping them between cameras.