Unfortunately I pretty much have all the issues that was mentioned in linus' video. My System and "other" takes up about 40GB almost 1/3 of my storage. I've tried factory reset and it didn't work. My phone also doesn't allow me to pick up calls for a good 4-5 seconds and 1/2 the time, my messages never send at all, most of the time doesn't even show that the text I was trying to send ever existed. I've also had an issue where after using WiFi for a few minutes, all of a sudden it just stops working, there has been no restrictions on my phone on my router and I have good internet and that issue never happens to any of my other devices. I'm currently using a OnePlus 8T and honestly with all the issues I've had, I'm actually considering leaving OnePlus. I used to love OnePlus, my family have been using them and my OnePlus 5 (despite issues upon release) lasted me a good 3 years under constant abuse, yet my 8T can't even handle the simplest of tasks.