I just ran out of memory card space on my camera - there were only four short videos on the SD card at that point, so I was a little confused. Loaded it into the computer and uploaded those files, then went looking through the other folders on the SD card and found a whole folder full of CPI files. Quick google search has informed me what they are. It would seem that every video I've ever taken is being stored on the SD card and when I upload and clear the card, these files are staying there.
I just want to know if they are important and if I need to keep them or if it's OK to delete them, as they've obviously very nearly filled the space on my SD card! They also show up on my camera when viewing photos as a white screen with the message: "This motion image cannot be played" and I never figured what was going on with that until now, as it must still be reading the CPI files. So delete, yes or no, and do the videos that I've taken on my camera and since uploaded to the computer have the information that is in the CPI files?