how can i recover my pan drive sandisk 4gb 2009?

DB... sometimes Google translate gets things wrong.

Toerag.
May 2012

2 hours to dry is very probably not enough.

Take some container sightly larger that the drive, a glass is usualy just correct.
Pour some rice in it and place the drive. Fill with more rice untill the drife is totaly covered.
Leave it to rest at least a full day.

The rice will absorb the water very effeciently. Many professionals use that method regularly.

Hope that it did not get damaged by been plugged in while not totaly dry.

Electro
May 2011

How do you know that tomorrow your scandisk pen drive will be in water for one minute, and then will not work even after drying it for two hours. You're just what is needed on this site, a clairvoyant to answer questions from people who give us no info.

DB
May 2011