Hello! The budget is low, and the requirement for mass storage or data reading speed is not high, so buying a mechanical hard disk is a more economical choice. But it requires high performance, so you can consider investing in solid state drives.

Here are some considerations:

1. Price: The price of mechanical hard disks is relatively low, especially for large-capacity storage, and the cost performance may be higher.

2. Storage capacity: Mechanical hard disks generally provide large storage capacity and are suitable for users who store a large amount of data.

3. Performance requirements: There are higher requirements for data reading and writing speed, and solid-state hard disk is more suitable because it has faster reading and writing speed and shorter response time.

4. Durability and reliability: In contrast, solid state drives are more durable. They have no mechanical parts and are not easily affected by shock or vibration.