Seagate Senior Researcher: Heat Can Kill Data on Stored SSDs. Jason Mick. Daily Tech. May 13, 2015.
A research paper by Alvin Cox, a senior researcher, warns that those storing solid state drives should be careful to
avoid storing them in hot locations. Average "shelf life" in a climate controlled environment is about 2 years but drops to 6 months if the temperature hits 95° F / 35° C. It also says that typically enterprise-grade SSDs can retain data for around 2 years without being powered on if the drive is stored at a temperature of 25°C / 77°F. For every 5°C / 9°F increase, the storage time halves. This also applies to storage of solid-state equipped computers and devices. If only a few sectors are bad it may be possible to repair the drive. But if too many sectors are badly corrupted, the only option may be to format the device and start over.
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