What is the opinion of Reddit about the
ADATA SE800 512GB IP68 Rugged – Up to 1000 MB/s – SuperSpeed USB 3.2 Gen 2 USB-C External Portable SSD Black (ASE800-512GU32G2-CBK)?

/u/gece7 if I was starting over, I would definitely go with something like this SSD which is on sale for $70 USD right now. Look for a USB 3.2 Gen2 (or sometimes 3.1 Gen2) SSD that advertises over 1000MB/s; that’s about the max you can get over USB 3.2*.
For the right price I would look for a 1TB, but get at least 480GB; Some Games likes Flight Simulator are going to use up half of that on their own.

Adata 512GB SSD: https://www.amazon.com/dp/B07V1H44XD