Can someone explain AWS GET?

For reference: GET Bucket (List Objects)

When I do a get request on the root bucket it comes back with test/ and test/subdir/ both 0 bytes. Which is correct, there should be 2 folders up there. When I upload a file to test/subdir/file. The root bucket has an item with the key=test/subdir/file. test/ and test/subdir/ are still 0 bytes. When I do a get request on test/subdir/ it returns nothing.

What's going on here?

Note: I do not have access to the console.