The RAM is 12GB/16GB, and the RAM type is LPDDR5X. The ROM is 256GB/512GB/1T with UFS 4.0. It supports Memory extension but does not support expanded storage. You can not use microSD cards or hard drives to supplement the internal storage of the device.
If you want to set Memory extension, please refer to the following steps:
[Settings] >> [Additional settings] >> [Memory extension], in this interface you can select the options of [4.0GB], [6.0GB] and [8.0GB] to create additional RAM by occupying storage.
Note:
Use the Memory extension feature only when there is enough storage space available on your device.