Ques: How to export the Default Solution to create a backup?
Answer: Follow the steps given below:-
Note: Make sure you have the System Administrator security role or equivalent permissions in MSCRM.
Step1: Click on settings and go to solutions.

Step2: Select your required solution form the list of solution.

Step3: Click on Export .

Step4: Click on publish all Customizations and then click on Next.

Step5: Change the reuired settings and click on Next.

Step6: Select Unmanaged Radio Button and then click on Export.

By clicking Export button you can export the unmanaged solution to any place on your system.