Hello, I hope someone can help me, I have only been able to use MSFS the week that it came out (after almost 10 days of downloading, I only have 10MB of bandwidth and it does not use everything when doing downloads) and I have had repeated problems with the pc file- fs-base-bigfiles-0.1.63.fspatch.
It happened to me with the first big update and now it happens to me again with the version 1.9.3.0
My installation is in C: \ MSFS2020, and in theory the download files - from what I have read - should be in:
“C: \ Users \ USERNAME \ AppData \ Local \ Packages \ Microsoft.FlightSimulator_8wekyb3d8bbwe \ LocalCache \ Packages \ Official \ OneStore”, I have searched other folders without success as one of the ways the developer suggests is to close the program and delete the last downloaded package and then open and continue. I don’t see any such downloads - despite the fact that something is seen to be downloading through my network traffic monitor - and I can’t find them using wildcards in programs like Total Commander or the Windows 10 browser itself.
I have more than enough space (307Gb on the SSD), plenty of equipment to run it, I have a freshly installed Win 10 and updated drivers but something continues to fail (only in MSFS, the rest of my games and applications work without any problem).
As I mentioned above, my bandwidth is limited and I am reluctant to have to reinstall everything again, the solutions given by the developers are practically “the problem is yours” and I hope that the community can give me a hand to get out of this condition. the big -huge- download files.
Perhaps for the US or Europe they are downloaded in minutes, or hours… but in my country, and more specifically in my small town, Internet and bandwidth is an expensive luxury - possibly I pay for 10Mb what someone else pays 100 or more). 
Thank you all for reading, I am waiting. Greetings from the South of Argentina