adding RAW files to CC on lightroom mobile

hi all.

im heading out to india in a couple of weeks for a month with a digital camera and sd card.

i have a lightning to sd card reader to import my images to lightroom mobile and keep a copy of the raw files backed up on the cloud.

can i ask:

1. once ive imported the raw images into lightroom mobile on my iPhone where are the files? do they upload to the cloud and then delete automatically from the iphone/lightroom mobile?

2. what is local storage and can / do i need to remove it?

3. once the files are in the CC and im back home how do i move them to my external hard drive without loosing all the edits/collection organisation?

on my mac currently if i drag the folder called 'imported photos' to my external SSD (where i keep all my photos) then it wont be organised correctly in all of the year/date folders. is there a way of doing this neatly and correctly?

thanks!