The camera puts its photos and videos in /DCIM.
Social media apps tend to put pictures in a subfolder of /Pictures.
Messaging apps tend to put pictures sent and received in a folder named for the app.

Unless Samsung is doing something strange....

names, for one. DCIM (which is short for ???) on both card and phone. Camera on card or phone. Not a folder structure that is intuitive to me.

Do you know anything about those photo organizing sticks?

I don't use them, but my 2-cents ...

- I believe that they are pretty expensive compared to USB thumb drives with the same capacity & performance. So you're paying a fair amount for their software and convenience.

- Their advertising (and ridiculous internet reviews) trigger all my suspicions of scamming.

What I'd recommend instead:

1) Use your phone to take pictures, but save them elsewhere. Offload to the cloud or a PC and organize them there. Remember your phone can/will get broken/lost/stolen at some point.

2) Save them in more than one place (multiple cloud accounts, thumb drive, burn to CD, whatever). Anything can get lost, even cloud access (google Megaupload and Kim Dotcom to lose your sense of security about saving things in the cloud).

Good luck