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Hello,

AWS Lightsail does not support downgrading by design—you can only upgrade, not downgrade. This is an official AWS Lightsail rule, not a limitation of Zeabur.

So, if you want 2C 4GB, there are two options:

Option A: Perform an internal Lightsail downgrade via snapshot + new instance

1. Take a snapshot of your current 8GB server.
2. Create a new medium_3_0 (2C 4GB) instance using the snapshot.
3. Point your services/domains to the new instance.
4. Once confirmed, delete the old one.

This process involves brief downtime and is more cumbersome. The monthly fee after downgrading will be approximately $10-12 (Lightsail medium_3_0 has increased in price).

Option B: Switch to a cheaper provider (highly recommended for more savings)

The cheapest option is Tencent Tokyo 2C 4GB, reducing your monthly fee from $44 to $4, saving you $480 per year.