And then I go & read ARS Technica...
A one Tb SD card for ~$150.
How many 1Tb SD cards can you fit, along with their reader hardware, in the same space as your typical internal SSD?
Get an external enclosure with power supply, load it full of 1Tb SD cards, & plug a USB-C cable into it/your device to give it the storeage capacity of your typical cloud server.
I imagine a case the size of an RPi with battery could fit in a pocket & offer more "personal cloud" capacity than damn-near anyone else on the market.
*Homer Simpson happy moaning*Mmmmmmm... Files!