S7 edge how to check if your /system is protected?

I recently Rooted my phone and wanted to change my lock screen sounds. But I can't change my /system to R/W. Root Explorer no longer has the R/W button and SuperSU latest versions are system-less. I've tried terminal emulation and hours of googling to no avail. I had a reply saying that my /system could be protected. So how do I check if my /system is protected? If so how to i remove the protection.

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Last post by cschowalter
2 hours ago
Last post by wkonopelski
1 hour ago
Last post by marco07
3 hours ago
Last post by raynor.antonetta
3 hours ago