https://www.crucial.com/compatible-upgrade-for/lenovo/yoga-730-13ikb and other links tell us the RAM is soldered down and no sockets.
As to the eGPU, good hunting. You didn't reveal which country so folk may offer one in Australia and you are in England or vice versa. Shipping and duties may be as much as the eGPU.
My laptop (specs at the end) is lovely, but its graphical performance sucks due to the dedicated UHD 620. I saw the Lenovo Thunderbolt 3 Graphics Dock online ( https://support.lenovo.com/dk/en/solutions/acc500012 ) but unfortunately, it's out of stock everywhere. are there any alternatives to this?
BTW I live in Denmark, a European country.
It needs to be both the case/dock and the GPU
no answers saying "buy a new pc"
ps. is it possible to add more ram via thunderbolt 3
Specs: PC: Yoga 730 13IKB
CPU: Intel Core I5-8250U
GPU: Dedicated; Intel UHD 620
Ram: 4GB (only 3,8 is usable)
Screen: 13,3" FHD
in advance thank you so much for your help
Moderator Edited: Fixed URL