Shortly after the IPO in 2015, a group of investors filed a class action lawsuit against Etsy claiming fraud. The suit claimed that Etsy's CEO and officers failed to disclose numerous problems with the site which could affect the stock price, among them that "more than 5 percent of all merchandise for sale on Etsy’s website may be either counterfeit or constitute trademark or copyright infringement” and that “brands are increasingly pursuing sellers on Etsy for trademark or copyright infringement, jeopardizing listing fees and commissions." The suit also claimed that Etsy management knew of the rampant trademark and copyright infringement but did little to stop it, and in fact worked to hide this information from potential investors.
There are also plenty of photo hosting sites you can use to store your image files online, including Google Photos, Dropbox, SmugMug and Photobucket. Most of these sites offer basic free storage for a small quantity of files, and they make it easy to label and organize your images as you see fit. Different sites have different features, but most offer premium paid services that may better suit your needs.
If you are starting a business for the first time there's a wealth of support and information available including online groups. If you plan to sell on Etsy, you will find many tutorials available to get you started. You'll also find a wide selection of books published on the subject of running a successful handmade business. When looking at books, make sure you find books that are up to date. The market for selling handmade cards and other products is constantly changing. Another great option is online training and workshops.