So looks like according the stack overflow link from @hades@lemm.ee above, your files are individually encrypted. Based on the solution comment, there should be a .MetaEcfsFile with the Samsung file encryption metadata in the SD card root directory if this is true. If so, you would likely need to plug the SD card into a Samsung phone (unclear if it needs to be original phone, same model, or just Samsung in general) and use the “Biometrics and security” menu to hopefully decrypt the SD card. If you still have a newer Samsung galaxy, I’d try with that one first before attempting to locate an older model. And if that doesn’t work, it might require the original phone. Backup SD before doing any of this.
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aww @lemmy.world Ruby likes hanging out with big dogs because they can't corner and she enjoys juking them out of their ankles. This is her best friend Finn
aww @lemmy.world Fun fact: crocs are the perfect size for elevating a dachshund to sausage pope. This is pope Ruby
Programmer Humor @lemmy.ml The binary data format, CBOR (Concise Binary Object Representation), is written by C. Bormann.

Looking a bit further, it seems your only luck would be with your original device since the encryption probably relies on some hardware specific keys. Samsung’s guide says even factory resetting the original phone prior to decrypting would be enough to make the SD card unreadable.