I simply create a JPG for ease of uploading... then delete it as it can be recreated any time.I seldom satisfied with any image after it is registered and stacked. Fits seems to be the most common extension to use in a Processing Program so the .jpeg is just taking up space on the drive at the start. You'll be surprised at how quick you'll have Terabytes of data.
FITSfile is like a DiCom image. It contains data that the programs can read. Was really nice the other night when I had moved my camera for reframing of a capture. Then went back to Pleiades and wanted to do additional captures to stack... but how to do it realizing that I had changed my camera angle. INDI to the rescue. The "Load & Slew" option allowed me to load an existing
FITSfile and after solving and slewing it told me that my camera angle was not correct and how many degrees to turn it and which way. That was when I REALLY appreciated the camera rotator.
As soon as my camera is detached for storage, it immediately has the cover placed on it. Same way with the filter wheel and the flattener (which is left on the scope). First thing is to line every cover up in the order that the chain comes undone, so I can quickly reach down and grab what I need. I learned that a long time ago with my DSLR cameras and changing out lenses.LOL You'll learn soon enough why we don't remove the camera more often than we absolutely have to. Dusty Bunnies! Cameras are dust magnets!