Xtrashare Review by a SharePoint Consultant
Usually I hate installing third party tools on an environment because they are laggy and it's a mess to install. However, Xtrashare is the only solution I actually recommend. It's really easy to install (don't forget to turn off UAC ) and once it's in place , its the easiest thing to explain to your client.
Free up to 20 users.
Easy to explain to client