SD cards blank

Hi
Never uploaded to a Mac from an SD card until a few days ago as always uploaded to Ipad (previously pc) but Ipad wouldn't do it.
I didn't press delete after import but when the cards went back into the camera, it came up as no images in folder!
One card had only a few shots on and were all uploaded but the other had about 3 years of stuff on, not all uploaded, but now appear to have been deleted somehow!
How does that happen?
Never uploaded to a Mac from an SD card until a few days ago as always uploaded to Ipad (previously pc) but Ipad wouldn't do it.
I didn't press delete after import but when the cards went back into the camera, it came up as no images in folder!
One card had only a few shots on and were all uploaded but the other had about 3 years of stuff on, not all uploaded, but now appear to have been deleted somehow!
How does that happen?

What programme did you use to import from the card?
In Bridge, for example, when using Photo Downloader, there is a box to tick for 'delete original files' which will remove all images on the card. Check the status of that box...(or its equivalent, depending on the software you are using to import images)
In Bridge, for example, when using Photo Downloader, there is a box to tick for 'delete original files' which will remove all images on the card. Check the status of that box...(or its equivalent, depending on the software you are using to import images)

I think that SaltireBlue has the answer. On most software used to transfer images from one source to another there is a box which is either ticked or not which will delete all the original images if ticked. It is actually a good idea to move all images from the card to a computer or other storage space and then format the card in your camera. This frees the space and enables the camera to write information faster to the card. It is also less likely to mean that the card has become corrupted which can cause headaches of their own.

It will probably have the date of the actual photos as a file name - that is what mine does but that is just camera and computer - all images from one date are filed together in a folder named, for instance, 20191116 for images taken today. I don't know how you would find a different folder on an iPad - have you tried looking on Google to see if there is some help there. I very rarely take photos with my phone let alone a pad but I know that if I connect the phone to my laptop I can transfer the photos from the phone, as it comes up as a new drive, to a folder on my computer. Can you try that with the pad?

What programme did you use to import from the card?
Just using the Photos software with the import option. Again, its imported images from one card but not the other. Its like it says oh this is too much hassle, too many images, and sods off!
All the images are still in the cards incidentally, none were deleted, but just cant all be viewed via camera/s.
Will have to import to the Mac again I suppose 😩
