Get a 2TB SSD Compatible with Steam Deck or ASUS ROG Ally for $169.99 - IGN

The ASUS ROG Ally even has an official SSD swap guide

Make your ASUS ROG Ally or Steam Deck faster and install more

Steam Deck - IGN

Go big and save $130 on this 2TB SSD upgrade for the Asus ROG Ally

Western Digital launches WD_BLACK SN770M M.2 2230 SSD for handheld

ROG Ally (2023), Gaming Handhelds

Handheld Companion is All You Need!, Steam Deck, Ayaneo

Upgrade your Steam Deck or ROG Ally with this small 2TB SSD that's

ASUS ROG Ally W-D PC SN740 SDDPTQD-512G 512GB M.2 2230 NVMe SSD

Steam Deck OLED review : r/pcgaming