Deepin - Sudden hard drive activity slows down the system

I am using Deepin and suddenly there is a lot of hard drive activity which slows down my pc to a crawl. I checked but it doesnt seem anything is taking up the RAM or using the hard drive, i dunno what it cold be.

I have 3.30ghz PC with 6gb of RAM

I hadn’t heard of Deepin, so had a browse of the web.
This link Deepin Linux Review: Stylish Distro or Spyware? - Make Tech Easier states that " if you have less than 64GB to dedicate to its installation, it will refuse to proceed." That’s an awful lot, considering Ubuntu requires only ~5GB.
In addition, it seems that one can’t install Deepin unless one accepts the End User Agreement. This is astonishing for an open source operating system. Why?
Deepin is of Chinese origin and several reviews question it’s security, although without any hard evidence of malicious behaviour.

You mention a lot of hard-drive activity but then say it doesn’t seem anything is taking up the RAM or using the hard drive - so I’m not sure what you mean. If the computer is very slow but neither the RAM nor HDD is in heavy use, then it might be an idea to check network activity. Have a look at networking - How to display network traffic in the terminal? - Ask Ubuntu for some useful tools. tcptrack looks good.

I’d be interested to hear from any other Members who have experience of Deepin.
Let us know how you get on.

Keith

[EDIT] “bmon” is better:

sudo apt install bmon

If the hard drive is being used, something must be using it! In the command line, you can use top to see what procedures are running and how much CPU activity and memory they are using. That will generally show anything suspicious.Have you looked in the Deepin menu to see if there are any GUI tools for monitoring processes and network traffic?