Sorry to report the issues here. The laptop is old enough to still be crippled as far as wifi upgrades by the HP BIOS whitelist problem. Any wireless card other than one of the models offered by HP at the time the laptop was sold will prevent the laptop from booting. None are compliant with current wifi technology 802.11ac dual band. The mSATA slot on that laptop is only for an "acceleration cache". You cannot put an mSATA in there and run the OS from it. That's why on the models where the mSATA was included it's only a 32 gig disk. I actually used to own this model laptop and am fully aware of its upgrade limits and we have dealt with it for years. Your best upgrade is to max the memory and install a 2.5 inch SATA SSD in place of the hard drive.
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