Microsoft has free storage options too. As does Dropbox, et al.
G Suite is actually pretty good all things considered but MS won the Office / Outlook / Excel wars ages ago. All big enterprises are running windows. That fight is over so long as MS doesn’t bungle Windows11 too badly.
Looks like a usb, and a molex power connector. You’d have to break out a multimeter to figure out what’s active and what’s a ground though, and then have to bit bang your way to figure out what each connection does.