Allow uploading to different sub folder in S3

I would like to suggest a feature request.
Currently, there is no option to specify the high-level subfolder within an S3 bucket to upload the files to.
Meaning, given bucket X, all files will be uploaded to S3 in the form:
x
|_url1
|_url2

I would like to be able to specify the high-level folder in which the URLs will be stored.

The need

I'm using the tool to test our URLs from different regions worldwide in order to mimic users from different places around the world.
The URL of the website is the same, but the user is coming from a different location. Just setting up a new EC2 instance on different AWS region.

I would like to separate the results from different locations without creating a bucket for each location, it's a bit messy.

If anyone has any idea on another approach to do that, I would love to hear it :)

Example

X
|_Ohio
| |___url1
|_Tokyo
|___url1

More info

Version: 8.0.0

No file, test, or entry point is named. Start by locating the S3 upload configuration and the code that constructs object paths, then trace how command-line or configuration options reach it. Done means uploads can be separated under a user-selected high-level prefix without requiring a bucket per region, with coverage for the new option.