Personal Use Photography Items Converted To Photography LLC Business

Nearing retirement age, I began to purchase Photography Equipment to begin a Photography Business when I did retire.  I also started taking photos and posting them to stock photo sites for sale prior to forming my LLC in 2019.  Going through the business asset section in TT it recommends that items costing less than $200 be moved to Business Expense section.  Going through some of the FAQ's I found something about Personal use items can't be converted to Business Expenses when you start the business???  I'm talking about personal use Photography Equipment such as tripods, backpacks, batteries, Memory Cards, etc..  Some of which I bought 2 - 6 years ago.  Can these be expensed as startup costs, other misc. costs or depreciated as an asset even though below the $200 recommendation?