[gameover]

This is what i did after i used the clear storage option.Im here to teach the solution to the stupid problem with the htc diamond 4g storage.I found it in different forums on the web since HTC or Sprint (NYSE: S) doesnt have knowlegde of its own products and just sell them as it is and claim that they have good customer service.Ridiculous.I was just about to go crazy with this problem once my phone was brand new and it lost the internal storage after a hard reset.
Ok follow this.
1.connect your phone to the pc and choose the disk drive option instead of active sync.Open the computer folder and u should see only one option as as external drive or something like it.
2.right click on the folder and see its properties.U should be able to see that it istill has its 3.7g memory showing.If not u will see it on the next topic.
4.Right click on the storage folder and choose the option FORMAT.
5.U will do the full format of that storage not the quick one.On this level u should see on the format window that the 3.7 g is there right?
6.If not disconnect the phone and connect to the pc again till u see it.
Is just unbeliavable that we as costumers have to come up with the solutions for these stupids issues.SHAME on u SPRINT and HTC.
7.Once u start formating it will take about 10 to 15 min to finish.Dont touch your phone till it ends,just leave it connected to the pc.
8.Once is done u go to check where u usually saw the NOT INSTALLED stupid message and find out that the 4g is back.It should be ,if not soft reset your phone.Or start over.
9.Its not over yet.It will show internal memory 2 now and on the device information on your phone it still not reconize the 4g on the internal storage list on HARDWARE.its ok for now.
10.Now u will perform the HARD RESET on your phone using the clear storage option on settings.Pick the Clear storage and format internal storage option before typing 1234.Ok now once u started the hard reset it shows a quick error message as unable to locate storage or something like it.Dont worry about it.
Once the phone start up again go to the device information and see it is back to normal and there is not internal storage2 anymore ,only internal storage.
Now u are back in business again.I hope this information helped u and i thank the guys who discovered it.Not the HTC or SPRINT who didnt know how to fix this.BIG SHAME and please come up with the new ROM already so u dont get people wasting their time with stupid issues.
See u..... i found this solution give credit to the original poster.