What is the problem? Please be detailed.
I couldn't find a description of the role and use of the layers folder which is created by ODK Collect inside its odk data folder together with the forms, instances and metadata folders.
I think a short description of all 4 folders would be useful in http://docs.opendatakit.org.
What ODK tool and version are you using? And on what device and operating system version?
ODK Collect 1.10.2
What steps can we take to reproduce the problem?
What you have you tried to fix the problem?
I searched the forum, http://docs.opendatakit.org website and I googled it.
Anything else we should know or have? If you have a test form or screenshots or logs, attach here.