https://www.lenovo.com/ch/de/glossary/what-is-quad-level-cell/
Quad-Level Cell - Wichtige Informationen | Lenovo Switzerland
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https://www.lenovo.com/in/en/glossary/what-is-quad-level-cell/
What is Quad-Level Cell? | Benefits and Uses | Lenovo IN
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https://hothardware.com/news/micron-qlc-ssd
Micron And Intel Announce Shipment Of Industry First Quad-Level Cell (QLC) NAND Solid State Drives...
May 21, 2018 - Micron says that the new QLC NAND has 33% more bit density than TLC NAND and is able to address applications previously only serviced only by HDDs.