According to the NYS Department of Financial Services:

“Determining the value of your personal property requires an extensive analysis on your part. You should go through each room of your house and list every piece of furniture and fixture within it. Some insurance companies provide Household Inventory lists which can be helpful with this task. Items such as sofas, tables, beds, TVs, refrigerators, and lawn mowers should be included in such a schedule.

“As you compile your inventory, supplement it with receipts indicating the date of purchase and purchase price and photographs of major items. Your inventory should be updated on an annual basis, or at the very least, whenever you purchase a large appliance or item of furniture.

“Additionally you may want to make a video of your possessions. If you do, make sure all the drawers and/or doors of your furniture
are open so you have a record of what is stored. It is also helpful to verbally describe major items as you record the video. When
complete, make a back up of the video and store this inventory list and video in a safe place away from your home, such as in a safe
deposit box , in the home of a friend or relative or in your workplace.”

Also, don’t forget items in sheds, on or under porches, on the property, stored away, et cetera.

Here is the link to your Free Home Inventory Checklist from NYS.