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.
Dropbox - Online Sync and File Sharing
Sellbery - Easily automate product feeds from Shopify, Magento to Amazon, eBay and other marketplaces. Fully utilize the most profitable eCommerce channels and increase sales.
Google Drive - Access and sync your files anywhere
Enspire Commerce - Omni-channel ecommerce management solution
Mega - Secure File Storage and collaboration
Radial - Radial offers order management and store fulfillment solutions.