Just checked on a Mac with 10 days uptime in Activity Monitor and Spotify has written 28.99GB and read 325MB. For comparison Chrome wrote 1.93GB, iCloud (cloudd) wrote 10.47GB, Mail 927.4 MB, and Slack 607.8MB.
There's probably some way to get that info too, but of course I killed the app as soon as I saw what was going on, so it's too late!
Edit: uptime does give it a firm upper bound, at least. My current uptime is a bit over 12 days. So that's an average of 80GB/day at least, more if I started Spotify sometime after boot.
ps aux | grep ' /Applications/Spotify.app/Contents/MacOS/Spotify$' | awk '{print $9}'
"We've seen some questions in our Community around the amount of written data using the Spotify client on desktop. These have been reviewed and any potential concerns have now been addressed in version 1.0.42, currently rolling out to all users."
So... sounds like it's fixed? If so, good job on making a fuss, everybody!
Spotify launched 10 days ago, 127MB written, 1.29GB read.
maybe relevant, I'm running Mavericks.
Pretty heavy usage, though.
vs
Spotify R 100MB/W 400MB
What in blazes are the offending programs doing? If it were swap, then one should expect an 1:1 ratio between R and W, but that? Seriously?
I don't list to _that much_ music?!