How much RAM does the Lenovo ThinkPad T400s support?

The ThinkPad T400s supports up to 8GB of memory.

What storage drives fit the Lenovo ThinkPad T400s?

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

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkPad T400s, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkPad T400s — 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.

Specifications reported for this system.

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Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkPad T400s, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkPad T400s — 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.

Specifications reported for this system.