ars Technica: Reports of tens or in some cases hundreds of gigabytes being written in an hour aren't uncommon, and occasionally the recorded amounts are measured in terabytes. by Dan Goodin
'The overload happens even when Spotify is idle and isn't storing any songs locally.
'The behavior poses an unnecessary burden on users' storage devices, particularly solid state drives, which come with a finite amount of write capacity. Continuously writing hundreds of gigabytes of needless data to a drive every day for months or years on end has the potential to cause an SSD to die years earlier than it otherwise would. And yet, Spotify apps for Windows, Mac, and Linux have engaged in this data assault since at least the middle of June, when multiple users reported the problem in the company's official support forum.
'"This is a *major* bug that currently affects thousands of users," Spotify user Paul Miller told Ars. "If for example, Castrol Oil lowered your engine's life expectancy by five to 10 years, I imagine most users would want to know, and that fact *should* be reported on."
'Three Ars reporters who ran Spotify on Macs and PCs had no trouble reproducing the problem reported, not only in the above-mentioned Spotify forum but also on Reddit, Hacker News, and elsewhere. Typically, the app wrote from 5 to 10 GB of data in less than an hour on Ars reporters' machines, even when the app was idle. Leaving Spotify running for periods longer than a day resulted in amounts as high as 700 GB.'