How much RAM does the Lenovo ThinkPad R400 (744515G), UK support?

The ThinkPad R400 (744515G), UK supports up to 4GB of memory across 1 slot(s), up to 4GB per slot.

What storage drives fit the Lenovo ThinkPad R400 (744515G), UK?

Compatible drive types: SATA 2.5" Hard Drive, SATA 2.5" SSD.

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkPad R400 (744515G), UK, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkPad R400 (744515G), UK — matched to its drive bays and slots.

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

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Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkPad R400 (744515G), UK, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkPad R400 (744515G), UK — matched to its drive bays and slots.

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.