SanDisk customers have been complaining about the company’s Extreme and Extreme Pro portable SSDs suddenly wiping data and, in some cases, becoming unreadable. Complaints go back at least four months, and SanDisk told Ars today that a firmware fix is coming “soon.” However, SanDisk only confirmed a firmware update for the 4TB models, despite an Ars staffer and online users reporting issues with 2TB drives.

An Ars reader tipped us (thanks!) to online discussions filled with panicked and disappointed users detailing experiences with recently purchased Extreme V2 and Extreme Pro V2 portable SSDs. Most users seemed to be using a 4TB model, but there were also complaints from owners of 2TB drives.