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Feel like sharing your photos with family without having to post them to social media? If so, Amazon just gave you another reason to sign up for (or keep paying for) Amazon Prime: It added a feature called "Family Vault" to its Prime Photos offering on Wednesday.

Prime members can share access to Family Vault with up to five other people, giving them access to unlimited photo storage even if they're not Prime members themselves. Family Vault also includes an additional 5 GB of storage for videos and other file types. In a press release, Amazon said Family Vault will help people keep all their photos, even across multiple devices and accounts, in a "single, sharable archive."

Family Vault users can add pictures manually or set their account to automatically transfer photos into Family Vault. Amazon also touts a "smart search" feature that lets users search by photo location, date or keywords like "sunset" or "wedding."

The ecommerce giant has been ramping up the perks for Prime subscribers lately, including Prime Reading, a rotating library of 1,000 free books, and Amazon Music Unlimited, which gives Prime members access to a 30,000-song catalog starting at $4 a month. That's on top of benefits like Prime Instant Video, free delivery on photo-print orders and free two-day shipping.