The place to discuss Faceswap and Deepfakes
https://forum.faceswap.dev/
It would be great if training set images could be in several subdirectories. For example Input A would be /facea and faceswap would load images from /facea/1, /facea/2 etc...
This isn't done to protect the end user. It is a support headache to allow this, as if a user (for example) points the training folder at the root of their hard disk, the process will walk the entire hard disk looking for any and every .png file it can find.
For this reason, this is unlikely to ever be implemented.