Hey Rob,
When the specifications list M.2 slots specifically in terms of storage slots, this refers to the types of storage that system will support and how many drives. In this case, the IdeaPad Slim 3x features two M.2 2242 PCIe 4.0 x4 slots, meaning that if one of slots is preoccupied by the included 256GB drive, there is an open storage slot for storage expansion. Also, many modern systems that have SSDs will feature M.2 storage slots, as this form of storage is more compact, efficient, and performant than traditional SSDs.
Please feel free to reach out to us with any other questions!
1 day ago
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Lenovo Product Expert