How to disable synchronized Picasa from Google account in Galaxy S4?
STEP 1. OPEN APPLICATION MENU
a). Tap on Application icon.
b). Tap on Settings and then tap on More icon as shown below.
STEP 2. OPENING APPLICATION MANAGER
c). Tap on Application manager as shown below.
d). Tap on Gallery to open gallery info.
e). Tap on Clear data and Clear cache as shown below.