I took around 3,000 shots but I download the memory card to my lap top and then from the lap top I download to external storage every night, no matter how insanely late it is, so I have NO pictures on the card the next morning.
I name my folders by date after transferring the images to my laptop so all of that day's images are in one folder, then I label the folder 10 28 18 MK morning DHS at night for example so I know where I was that day.
In general I employ a file naming system, for each one that is processed in Photoshop, with the date first then a text identifier (for Ex. Illuminations) possibly followed by the camera file number (example (exposure #) 1124).
I use a Western digital passport as my external drive. Because these external drives can not have images located IN THE CAMERA on the camera card directly downloaded I have to first download the camera card to a lap top and then from the lap top I can connect the external Western digital passport drive and transfer the files to the Western digital passport.
This means while I am traveling I have my pictures backed up to 2 places, my lap top and my Western digital passport.
So to recap: files on card in camera > connect card reader to lap top and transfer files from card to lap top > Connect external storage unit (Western digital passport hard drive) TO lap top and copy picture files on lap top to Western digital passport.
Finally, after I am sure the files have transferred and stored correctly I erase my memory card in the camera by formatting the card using only the camera body to do this (it avoids potential problems with external sources, say in my lap top, from improperly formatting my camera card so that my IN camera file system has problems writing to the card while I am shooting.)
The last thing I do before I pack up my camera equipment and LEAVE the room for Disney is TAKE A PICTURE of the room. This ensures that A) I remembered to replace the camera card and B) I took the battery out of the charger and returned it to the camera. These are the two most common mistakes that Disney Parks photographers make on these trips. Forget either one and you have to go back to the room and get them if you don't have spares. I usually erase the room picture as soon as I see it could be taken successfully. Then I am out the door.
~Joanie