I think my questions was not very clear. I am using the Seestar S50 and the Seestar iOS app. In the app's "Advance Feature" I turned ON "Save each frame in enhancing". Then begin Startgazing, point to M31 and record for say one hour. I then connect the S50 to my computer via USB and these are the files I would see:
Folder 'DarLibrary' containing one single file named "MasterDark_xxxxx.fit"
Folder "MyWorks/M 31" containing the final stacked file in FIT and JPG
Folder "MyWorks/M 31-sub" containing ALL single photos (not rejected) in FIT and JPG.
I initially was simply asking how to get multiple Dark, Bias and Flat files to process the above files myself. I don't see how I can do that using the app. For instance, there is no was to take multiple 10 seconds photos covering the sensor during the night session.