The Upload is the process of scanning a person's brain so it can be read by machines, moving a person's counciousness into the Digital afterlife. All memory up to the point of scanning is preserved.
The process involves a person 1) sitting below a medical device that disintegrates a person's head and scans it, leaving the body behind. This is fatal. 2) The memories are scanned and preserved, sent over to Lakeview 3) A customer service representative reconstructs a person in the simulation via the Torrent and wakes them up into Lakeview.
This is the process of uploading a person.