Try a Whatsapp support forum. But if you want try, XDA Developers.
I have an Samsung S2 (version 2.3.3) and intended to port my whatsapp chat history from the whatsapp backup folder msgstore.db.crypt5 (in the internal /sd/Whatsapp/ folder) to my new S5 via a microSD card, as advised by Whatsapp (http://www.whatsapp.com/faq/android/20902622)
The S2 was able to create a folder in the mSD card named "Whatsapp" and took some time to transfer the selected history file in. I did not reconfirm if the file transfer was successful within S2. When I tried to place the folder into my new s5, the mSD card could not be read. Placing the mSD card back into the s2, I was unable to locate the msgstore.db.crypt5 folder anymore.
My S2 is not rooted. Is there any way if I can retrieve previously moved files or reinstate the moved folders? Would greatly greatly appreciate if anyone could help as there is really impt information in the folder. Thanks in advance!