I have a new 1G sony VAIO pen drive.
When I click on "my computer" and see that there is a "removable disk" folder
(e.g. the pen drive has been drive).

But when I click on the removable drive, I was asked "Please insert a disk to the drive".

I cannot format the removable either.

Please advise how to fix the problem

Type "diskmgmt.msc"(without quotes and for xp only) in run dialog box then disk management window will open try formatting pen drive from here

Let me if this work

Also, make sure when you remove a drive in the future, go to the right bottom and use "Safely remove hardware".

https://www.askmehelpdesk.com/computers-beginners/remove-volume-control-taskbar-154585-2.html#post751756

jaspreet2142 was very kind the other day too.