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8 guaranteed-fit options
Guaranteed-fit promise
Every kit is matched to your machine's slots and checked against its published specs before we list it.
SATA 2.5" SSD · SATA 2.5" Hard Drive
SATA 2.5" SSD · 256 GB
Verified fit for your systemNot stocked right now. It's verified to fit — get an email the moment it's back.
Every drive here is verified to fit this system. Pick a drive type, then a capacity. Muted means it fits too — just not stocked right now.
Software for your upgrade — matched to your Lenovo ThinkCentre A55 + Lenovo D221.
Checks the drivers on your Lenovo ThinkCentre A55 + Lenovo D221, installs the safe updates Windows offers, guides the rest to the official download — and confirms exactly which of the upgrades above your machine has room for.
Specifications reported for the Lenovo ThinkCentre A55 + Lenovo D221.
We've already verified which memory and storage upgrades fit this exact machine — they're just not in stock at the moment. Leave your email and we'll tell you the moment any of them is available again. Guaranteed fit, no wrong parts.