The case from Sony is really good. Fits perfect. Adhensive pad is really holding tight. Two magnets hold the cover closed. The speed of the device is WOW. Syncing is a bit complicated because you have to add a network via the app but on the other hand secure, as no other wifi networks can easily be added from other people.
I'm using this USB magnetic cable... I use them on many devices on a daily basis.
https://www.amazon.com/gp/product/B019DNF7W0/
To minimize the physical force on the usb port.
The price is currently REALLY high. It started with 15 bugs or so... now.... 35. Insane. You get these cables in various kinds, but this one is working well and has a status-led on both sides. And it is easy to remove, even a protection when the device is dropped. Important thing is the shape of the connector. Don't buy other versions of this cable. I tested them all..... and all other are really shitty