No. What are you talking about? When you buy new SSD, in 1st few days/weeks, you are going to write much more as you bought it with intent to use it. You can't run 800GB of games from SSD unless you write them there 1st. And then those games have updates. Especially if you have newer or actively developed games. Steam here just downloaded Dreadnought patch (370MB), then it was reading/modifying/writing data for 5 minutes where average write speed was around 150MB/s. Smart patching makes sense. Reduces patch size, makes games ready faster. Imagine if such patch required raw 40GB+ download. You would be waiting instead of playing. Today's total DL from steam is just 1.5GB, but actual writes could easily be 60GB. But writes much more here. While I/O includes network writes, steam is still by far top at writing data. You can check yours when it is idle. (No active window open = no need to cache web data/game videos/screenshots/...) "I/O write bytes" almost do not change.