For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Friski - Search your Instagram posts
Dropbox - Online Sync and File Sharing
Tagsdock - Tag Instagram photos instantly from your iOS keyboard.
Google Drive - Access and sync your files anywhere
Link My Photos - Add shoppable links to your Instagram photos
Mega - Secure File Storage and collaboration