What is the introduction about the storage of the POCO Pad?

A: RAM is 6GB/8GB, and the RAM type is LPDDR4X. ROM is 128GB/256GB with UFS2.2. It supports memory extension: the 6GB model supports 2/4/6GB, and the 8GB model supports 4/6/8GB. The POCO Pad supports a single SD card slot, so you can use micro SD cards (up to 1.5TB).