If your SSD is brand new, it likely won't show up in File Explorer until it has been initialized and formatted.
Formatting a Solid State Drive (SSD) in Windows 10 is a standard maintenance task used to prepare a new drive for use or to wipe an existing one for repurposing. Because SSDs handle data differently than traditional hard drives, using the correct built-in Windows tools ensures the drive remains healthy and performant. how to format a ssd windows 10
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