Recover camera photos after SD card crash?

[Chris M]

thanks, I have no practical experience of doing this, assembling a PC is my limit

how discontiguous [fragmented] the blocks are is going to be a factor ?

both in terms of how long it takes and how much can actually be recovered ?

You're beginning to head into the why's and wherefores beyond my comfort zone. Basically, the software looks at corrupted or missing data blocks and compares it to nearby blocks. It then attempts to reconstruct said blocks. Then it looks for fragmented data. So, yes, the more damage, the longer it takes.

In theory, the more data there is to compare, the better the chances of recover. So an SD card full of photos in the same format is (in a perverse way) a good thing.

[handrawn]

sorry, I read a lot of theory once; I appreciate that yours is the practical approach

of course if the pointers are broken, because they all resided in the indexes [excuse if that is sloppy terminology], you cannot tell which blocks belong together [or in what order] other than by 'trial and error'