ADB Backup does not work for Skype App I have a Nexus 5 with Android 6. The ROM is stock and not rooted. My bootloader is locked too.

When I try to save the Skype data files (chats, messages...) nothing will be saved.

adb backup -noapk -f Skype.ab com.raider.skype


This command will be used to save the data like messages and more.

My question: How can I backup my Skype data?
I Think you need to connect  with pc and need to take backup as mentioned in the skype doc 

this is not poosbile with android 

https://support.skype.com/en/faq/FA413/how-do-i-back-up-my-configuration-and-instant-message-history?platform=android

this is for windows 
https://support.skype.com/en/faq/FA413/how-do-i-back-up-my-configuration-and-instant-message-history