Last time RapidShare would host your files as long as your Premium account is still valid but now they’ve changed the rule. The rule of files not being downloaded longer than 90 days will be automatically deleted is now effective for Premium accounts too! I think they’ve implemented this rule for Premium accounts is because they have too many premium account users and files are flooding RapidShare’s hard drive space really fast.
The way to avoid your files from being automatically deleted is to download it yourself when there is no download for nearly 90 days. If you have a lot of files, it is going to be tough to keep track of the last download time from Premium Zone. Good news is, the creator of RapidGrab and The Grabber, Team CodeMasters, has created a tool that is able to extend your files life in RapidShare. I also found another simple DOS tool that is able to generate lists that shows you which files are about to expire in RapidShare.
Rapid Refresh downloads very small part of your files from RapidShare so that it will set a new expire date.

You can download files selectively, just critical files or all. You can import links from clipboard or from Premium Zone. Importing links from clipboard is useful for keeping RapidShare files alive that are uploaded by other people. Unfortunately, if you don’t have a RapidShare Premium account, this tool won’t work for you.
Another DOS tool that I found doesn’t really have a name. I can only identify it as RS90(Maybe it means RapidShare 90 days expire?)

RS90 generates lists sorted by the date of last download. This gives you a clearer picture of which files that are hosted in RapidShare is about to expire soon. RS90 can support up to 3 RapidShare Premium accounts but do take note that RS90 doesn’t extend the expire date.
It is advisable to place RS90 folder at the root of your drive such as C:\RS90 then run RS90.exe. If you’re running RS90 for the first time, you’re required to enter the RapidShare Premium account login details. You won’t need to enter your login details the next time when you run RS90.exe. Your login details are saved as CLEAR TEXT in RS-Data.ini. Meaning anyone can open the RS-Data.ini file and see your RapidShare Premium login details. Just becareful of that…
[ Download RS90 ]
Hope these 2 tools are able to help you to keep your files hosted in RapidShare servers as long as possible.