Define how to bundle your resources; would it be best to store all of them in one FileStorage, or would it be practical to make multiple storages.
Its a good practise to keep things in one FileStorage if they belong to the same 'group' or 'type' of things. If you have a website that contains pictures about, for example, cars and bikes, it could be a good idea to a filestorage for each of the two.
Note that the file storage does not store file extensions, so if you currently have a mix of jpg, png and gif pictures, be sure you will be able to distinguish them from one another. You could decide to make a file storage for each file extension, or you could decide to structure the GUIDs with some pattern (if a GUID starts with "1" this means a jpg, if it would start with "2" it would mean a png, etc.).
Think of a way to map your existing identifiers of the resources to a GUID if you are not yet using GUIDs at this moment.
For example, if you currently use a filename for your pictures, like "monkey.jpg" and "banana.jpg", you could try to convert the filename to GUID. First you need to convert the String to an array of bytes see http://kseesharp.blogspot.com/2007/12/convert-string-to-byte-array.html, next trim or pad the array of bytes to have a length of 16 and then create a GUID based upon this array of bytes. Note that if you pad or trim the array to become 16 in length, there's a theoretical possibility you will map two files to the same GUID, so be careful there.
Make a little routine that will loop over your existing resources, and insert each resource to the appropriate FileStorage
Create a component that exposes the resource to the outside world, for example create a user control, or webpage that exposes your resources (see the example project for an example how to expose a picture from a FileStorage on the web).