You can set up your uploader to tag files. This makes it easy to keep your files organized in the dashboard after upload.
When creating the simple-file-upload input component, add a data attribute of tag with your desired string.
<input class="simple-file-upload" data-tag="avatar" name="user[avatar_url]" id="user_avatar_url">
All of the files uploaded with the above uploader will have a tag value of "avatar". When you log on to your dashboard and click View Files you will see a list of tags.
You can have as many tags as you want.
Check out the following video for a detailed overview of the tagging feature:
Tagging Feature