I keep a detailed record of all mine in an Excel spread sheet. Make, model, caliber, serial number, etc., including all accessories for each one, cases, holsters, magazines, scopes, etc. and 4 to 6 digital pictures of each. I keep the file on a separate flash drive along with the inventory files and pictures of all my other property and valuables. I feel that the flash drive provides privacy from any prying eyes that may use my computer from time to time as well as security from any access (legal or otherwise) that I haven't authorized. Only my kids know where I keep the flash drive.