Full sandbox
This is the queen of all sandboxes as it reproduces the production environment. Indeed, this sandbox type can be used for performance testing. That being said, it is a full copy of production regarding both metadata and data, and it is aligned with production limits for file and storage quotas. The refresh time is 29 days. However, you can always apply a sandbox template to select the objects you want to be copied.
Why don't you want all the data? There may be certain objects that are useless for your testing.
Copying GBs of data can be time-consuming and you should expect your sandbox creation/refresh time to take several days. The less you need to copy, the faster the copying process is.
When creating/refreshing a Full sandbox, ...
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