Panasonic quick-release 512GB OPAL SSD for FZ-G2 - FZ-VSDG25121

• User-replaceable -- can easily be removed using quick-release lever or can be securely locked down using optional locking screw
• Features protective cage to reduce chance of damaging the drive itself
• Includes hardware encryption (off by default)
• Fast NVMe connector & ompact M.2 form factor
• Located in rear of TOUGHBOOK G2

More info here