We've got ASUS China Product Manager, Tony Yu, playing with the ASUS RTX 4060 Ti DUAL SSD... where he not only used the aforementioned RTX 4090 as an external GPU, but plugged in both a Gen4 and Gen5 ...
It’s a little more expensive than a conventional SSD, but the Dual Portable SSD manages to combine good performance with an ultra-portable design, making it a great option for Time Machine backups ...
TL;DR: COLORFUL is developing the iGame Ultra Duo White SSD GPU featuring a GeForce RTX 50 series chip with dual M.2 SSD slots on the back, enabling expanded SSD storage directly on the graphics card.