I regularly received a message that my SanDisk cards were corrupt when downloading photos and the card needed to be repaired. The computer repaired the card and, thankfully, I didn't lose any images in the process. As an experiment, instead of swapping a new memory card each time I downloaded photos (as was my custom) I formatted the memory card, with the computer, and used that memory card multiple times in my camera. Please note: I also format the memory card each time I put in the camera (hence the double formatting). Since starting this double formatting, I have not received any error messages. I used to receive them every time I downloaded photos.
If you have this problem you may want to try this experiment and see if it works for you.
What are you using to "download" the files?
I use Windows Explorer and have never had a problem.
Gene51
Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)
photoman022 wrote:
I regularly received a message that my SanDisk cards were corrupt when downloading photos and the card needed to be repaired. The computer repaired the card and, thankfully, I didn't lose any images in the process. As an experiment, instead of swapping a new memory card each time I downloaded photos (as was my custom) I formatted the memory card, with the computer, and used that memory card multiple times in my camera. Please note: I also format the memory card each time I put in the camera (hence the double formatting). Since starting this double formatting, I have not received any error messages. I used to receive them every time I downloaded photos.
If you have this problem you may want to try this experiment and see if it works for you.
I regularly received a message that my SanDisk car... (
show quote)
I wouldn't use the computer's OS to format an SD card. I use this instead:
https://www.sdcard.org/downloads/formatter_4/
photoman022 wrote:
I regularly received a message that my SanDisk cards were corrupt when downloading photos and the card needed to be repaired. The computer repaired the card and, thankfully, I didn't lose any images in the process. As an experiment, instead of swapping a new memory card each time I downloaded photos (as was my custom) I formatted the memory card, with the computer, and used that memory card multiple times in my camera. Please note: I also format the memory card each time I put in the camera (hence the double formatting). Since starting this double formatting, I have not received any error messages. I used to receive them every time I downloaded photos.
If you have this problem you may want to try this experiment and see if it works for you.
I regularly received a message that my SanDisk car... (
show quote)
I always format the card in the camera and never had any problems. In theory, the last format you performed in camera will overwrite the previous format you did on the computer's OS.
Still not sure why you would have a problem just formatting in the camera...
photoman022 wrote:
I regularly received a message that my SanDisk cards were corrupt when downloading photos and the card needed to be repaired. The computer repaired the card and, thankfully, I didn't lose any images in the process. As an experiment, instead of swapping a new memory card each time I downloaded photos (as was my custom) I formatted the memory card, with the computer, and used that memory card multiple times in my camera. Please note: I also format the memory card each time I put in the camera (hence the double formatting). Since starting this double formatting, I have not received any error messages. I used to receive them every time I downloaded photos.
If you have this problem you may want to try this experiment and see if it works for you.
I regularly received a message that my SanDisk car... (
show quote)
I do that occasionally when using a card in different brands of cameras. I do the full format in the computer and I always format cards when I put them in the camera.
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Longshadow wrote:
Still not sure why you would have a problem just formatting in the camera...
The in camera is just a quick format and in some cases might not map around bad sectors. The computer format won't either, unless it's the full or long format, which will take quite a while. Quick Format just deletes the directory and sort of resets the File Allocation Table. It does not read or write every location. The in-camera format also sets up the directories that the camera expects to see.
I have had good success doing an occasional full format and maybe even running diagnostics in my computer, but always reformat in the camera before use. All of the benefits of the computer format are preserved, and files are set up properly.
larryepage wrote:
The in camera is just a quick format and in some cases might not map around bad sectors. The computer format won't either, unless it's the full or long format, which will take quite a while. Quick Format just deletes the directory and sort of resets the File Allocation Table. It does not read or write every location. The in-camera format also sets up the directories that the camera expects to see.
I have had good success doing an occasional full format and maybe even running diagnostics in my computer, but always reformat in the camera before use. All of the benefits of the computer format are preserved, and files are set up properly.
The in camera is just a quick format and in some c... (
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That would explain it. Thanks.
(I do understand the reason for in-camera formatting. I always do that.)
If I had a card that had defined or suspected bad cells, I'd replace the card. Cheaper than being disappointed on a shoot. You never know when other cells may go south.
I have had the same experience as Skingfong, but I think Larryepage explained it best for computers running Windows.
If a memory card gives me a problem, I just toss it in the trash. SD cards are cheap. Lost images can be expensive.
photoman022 wrote:
I regularly received a message that my SanDisk cards were corrupt when downloading photos and the card needed to be repaired. The computer repaired the card and, thankfully, I didn't lose any images in the process. As an experiment, instead of swapping a new memory card each time I downloaded photos (as was my custom) I formatted the memory card, with the computer, and used that memory card multiple times in my camera. Please note: I also format the memory card each time I put in the camera (hence the double formatting). Since starting this double formatting, I have not received any error messages. I used to receive them every time I downloaded photos.
If you have this problem you may want to try this experiment and see if it works for you.
I regularly received a message that my SanDisk car... (
show quote)
I personally will not do that, I only format my card in the camera, never had any issues with any card in over 10 years!
speters wrote:
I personally will not do that, I only format my card in the camera, never had any issues with any card in over 10 years!
Ditto.
(Mine have been in camera formatted
ONCE, when I first used it. I delete files on the card in the computer, then back in the camera. Been doing that for ten years.)
I have found that Formatting your card it is best to do it in the camera you are going to use it in. It appears that the computer may have a sligtly different method or software than the camera.
Don
donrosshill wrote:
I have found that Formatting your card it is best to do it in the camera you are going to use it in. It appears that the computer may have a sligtly different method or software than the camera.
Don
The camera may add something that is required that the computer will not.
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