Sinovoip BananaPi BPI-R4 how to installing directly to emmc
https://openwrt.org/inbox/toh/sinovoip/bananapi_bpi-r4#installing_directly_to_emmc
Sinovoip BananaPi BPI-R4 how to installing directly to emmc
https://openwrt.org/inbox/toh/sinovoip/bananapi_bpi-r4#installing_directly_to_emmc
try follow this, worked for me as well while installed the bpi-r4 a month ago. and no NVMe issue