Comment 20 for bug 1839237

I am suffering the same issue. snapd writing at 2 MB/s for almost 5 straight days. I have poor internet connectivity. Most of the time network monitor shows zero network activity, so snap is not "actually" downloading anything.

$snap changes
ID Status Spawn Ready Summary
54 Doing today at 10:35 -04 - Auto-refresh snap "chromium"

$ sudo fnotifystat
Total Open Close Read Write PID Process Pathname
 55.0 18.0 18.0 19.0 0.0 13786 snapd /var/lib/snapd/assertions/asserts-v0/model/16/generic/generic-classic
 54.0 18.0 18.0 18.0 0.0 13786 snapd /var/lib/snapd/assertions/asserts-v0/model/16/generic/generic-classic/active
 54.0 18.0 18.0 18.0 0.0 13786 snapd /var/lib/snapd/assertions/asserts-v0/serial/generic/generic-classic/d4eca5b4-8c2b-4ec1-a6b2-4ed7a8e76fbe
 54.0 18.0 18.0 18.0 0.0 13786 snapd /var/lib/snapd/assertions/asserts-v0/serial/generic/generic-classic/d4eca5b4-8c2b-4ec1-a6b2-4ed7a8e76fbe/active
 36.0 18.0 18.0 0.0 0.0 13786 snapd /var/lib/snapd
 26.0 0.0 13.0 0.0 13.0 13786 snapd /var/lib/snapd/state.json
  4.0 1.0 1.0 0.0 2.0 13786 snapd /var/lib/snapd/state.json.8s9NlHqn9hgk~
  4.0 1.0 1.0 0.0 2.0 13786 snapd /var/lib/snapd/state.json.9K7JVycntjF2~
  4.0 1.0 1.0 0.0 2.0 13786 snapd /var/lib/snapd/state.json.DQF0MS3WKj05~
  4.0 1.0 1.0 0.0 2.0 13786 snapd /var/lib/snapd/state.json.Llsbh5NnGHgK~
  4.0 1.0 1.0 0.0 2.0 13786 snapd /var/lib/snapd/state.json.hkfJT9N0htBG~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.4XgMb38QNtrW~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.6vHSRf3xbRS5~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.FwlhlyDlFXLp~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.G64fgNkBmr2x~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.Kp061JNgygDv~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.PQ5byShcJ5Ym~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.Q6PC97T8x9rm~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.RWkVcKbtsGw4~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.Wr5BSmHwg0k1~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.brJjjjMnyrmB~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.cbv2dSN9YH8r~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.pPjJXh9CQRG6~
  2.0 1.0 0.0 0.0 1.0 13786 snapd /var/lib/snapd/state.json.rwSwHlQ95nv7~

This is chewing up my SSD and my last SSD failed at only 10% write life used, so it is a real concern for me.