Unpowered SSDs in Your Drawer Are Slowly Losing Data

An anonymous reader shares a report: Solid-state drives sitting unpowered in drawers or storage can lose data over time because voltage gradually leaks from their NAND flash cells, and consumer-grade drives using QLC NAND retain data for about a year while TLC NAND lasts up to three years without power. More expensive MLC and SLC NAND can hold data for five and ten years respectively. The voltage loss can result in missing data or completely unusable drives. Hard drives remain more resistant to power loss despite their susceptibility to bit rot. Most users relying on SSDs for primary storage in regularly powered computers face little risk since drives typically stay unpowered for only a few months at most. The concern mainly affects creative professionals and researchers who need long-term archival storage.

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