Increase Amazon WorkSpace Pool size to 512 GB

To increase an Amazon WorkSpace storage to 512 GB, you'll need to modify both the root and user volumes. Here's how to do it:

As an administrator:

1. Open the WorkSpaces console at https://console.aws.amazon.com/workspaces/v2/home
2. In the navigation pane, choose WorkSpaces
3. Select the WorkSpace you want to modify
4. Choose Actions, then select either "Modify root volume" or "Modify user volume"
5. Choose a volume size or select Custom to enter a custom size (up to 2000 GB)
6. Save your changes

Important considerations:

• WorkSpace volumes come in specific configurations: [Root(GB), User(GB)]: [80, 10], [80, 50], [80, 100], [175 to 2000, 100 to 2000]
• You must set the Root volume to at least 175 GB to expand the User volume beyond 100 GB
• To achieve 512 GB total storage, you could configure the root volume to 300 GB and the user volume to 212 GB, or any other combination totaling 512 GB
• After the increase is complete, the WorkSpace must be restarted for changes to take effect
• The process might take up to an hour
• During the increase, users cannot change compute type, switch running mode, restart, or rebuild the WorkSpace
• There's a 6-hour waiting period after WorkSpace creation before you can increase disk sizes
• After the initial period, disk size can only be increased once in a 6-hour period

Note that this process is for increasing individual WorkSpace storage, not for scaling the number of WorkSpaces in a pool. If you're looking to adjust the capacity of a WorkSpaces Pool (number of instances), you would use the capacity and scaling features in the Pools section of the WorkSpaces console.
Sources
Increase Amazon WorkSpace size to 512 GB | AWS re:Post
Increasing WorkSpace disk size - Amazon WorkSpaces
Amazon WorkSpaces FAQs | Persistent Desktop Virtualization
Auto scaling for WorkSpaces Pools - Amazon WorkSpaces