You can use the InfinShare Outbox system to generate a link that will allow clients to download data from your site without the need for a user account.
To create an InfiniShare Outbox link do the following:
1. Log into the site and navigate to the location of the data you would like to share.
2. Select the files or directories you would like to share. 
3. Click the InfiniShare Outbox button. 
This will open the Create InfiniShare Link window.
Here you can adjust the following information:
-Number of days before link expires
-Number of users before link expires
-Password
4. Click the copy icon 
to copy the link to your machines clipboard to paste it into a email or message to your client.
5. Click Save