... and USB stick memory to backup or transfer files. My Chromebook works with my big USB backup drives, but I generally don't do that.
Transferring jpg files from my phone or camera to the Chromebook isn't a problem. The Chromebook photo editing software I have isn't sophisticated, it's not Photoshop, but it's fine for editing photos for email.
I store some stuff "in the cloud" but mostly that would be stuff I'm working on from multiple computers and sharing.
For many purposes Chromebooks work without internet connections. I can write eight hours without an internet or power connection. The battery on my Chromebook lasts a long time.
I don't often use Google Docs, which has fairly good word processing and spreadsheet capabilities. My wife's sister considers Google Docs her first choice in word processing and spreadsheets. The files she creates are easily exported and shared. She's the one who convinced me Chromebooks were worth looking into.
My previous favorite laptops were dual boot Windows/Debian machines. I still have one I use when some job requires Windows but that's also the laptop I hate taking with me, the one I have to babysit. Losing that would hurt at least seven times more than losing my Chromebook.
I was irritated with my idiot dog when she broke my old Chromebook, but I got another one, moved the SD card over, and was good to go. All my apps transferred automatically when I set it up.
If my idiot dog had broken my Windows/Debian machine replacing it or repairing it would have been so easy, which is why it lives in my home office.