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EDIT: According to Spotify this issue has been fixed in the 1.0.42 version so the case has been closed. Personally I have no more issues with this anymore on any computer. Thanks everyone for making this happen !!!
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original post:
Major disk write activity detected on the Windows/Mac app. Does not behave like that when using the browser player.
Please look into this thread, more details there:
https://community.spotify.com/t5/Desktop-Linux-Windows-Web-Player/Spotify-killing-my-SSD/m-p/1365378
Attached readouts from a Win7/64 PC during one hour and ten minutes. No offline playlist syncs and zero songs were played during that hour, only the spotify app tray active in background!
No disk drive, SSD or standard HDD can take that rate for a long period of time.
PLEASE ADDRESS THIS ISSUE ASAP OR BE THE NEXT SAMSUNG NOTE !!!
If you're running a deprecated OS (Windows XP, Vista; OS X 10.7, 10.8), don't worry. A fix has automatically been rolled out to you too. To ensure you're running this version, just close/reopen the desktop app twice.