Century Japan has come out with a simple solution to convert 3.5” SATA HDD to an IDE HDD. This is a very cheap alternate when you are struck with an old PC with only IDE HDD connector. Also in future when you go for an upgrade or a new system you will be able to use the SATA HDD without any problem or expense. Century CRP35-PS4P kit is very simple to use and doesn’t need any special tools.
You can also convert your IDE HDD to SATA HDD. Both ways you can use your old or new HDD.