Amazon.com: SanDisk Micro 256GB Extreme UHS-I SD Card Works with Sony Xperia 10 III, Xperia 1 III, Xperia PRO-I Smartphone (SDSQXA1-256G-GN6MN) Bundle with 1 Everything But Stromboli MicroSD Memory Card Reader :
How to Insert SIM & SD Cards on SONY Xperia 1 III – SIM & SD Installation - YouTube
Xperia 1 III|価格比較・SIMフリー・最新情報 - 価格.com
Xperia 1 III SOG03】SIMカード(au Nano IC Card 04)・microSDメモリカードを取り付ける - YouTube