How much RAM does the VAIO VPCJ21S1RB support?

The VPCJ21S1RB supports up to 8GB of memory across 2 slot(s), up to 4GB per slot.

What storage drives fit the VAIO VPCJ21S1RB?

Compatible drive types: SATA 2.5" SSD, SATA 3.5" Hard Drive.

Guaranteed-compatible SSD and hard-drive upgrades for the VAIO VPCJ21S1RB, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the VAIO VPCJ21S1RB — 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.

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 VAIO VPCJ21S1RB, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the VAIO VPCJ21S1RB — 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.

Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.