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I wanna add an additional SSD internally so I can have a dual boot laptop with Linux and windows

Hi @j1402 , Here’s the hardware maintenance manual for the laptop. Go to p.40 and p.42 respectively to view the necessary pre-requisite steps and then the procedure to remove / replace the HDD and the SSD. Here’s the Lenovo V330-15IKB Platform Specifications which show what types of M.2 SSDs are compatible with the laptop. Here’s a link that shows what SATA SSDs are available (examples only) in case you wish to also upgrade the HDD to a SSD (scroll down past all the memory modules and M.2 SSD options)