OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
13インチMacBook Pro - Apple(日本)
Macbook Pro [8gb RAM, 512gb SSD] - Bright Technologies
M1 Mac RAM and storage can be upgraded after purchase, but it's not easy - 9to5Mac