4Sync, one of the world’s leading file-synchronization services, has introduced a killer web-feature – “4Sync Comment Pins” SAN FRANCISCO, CA – April 25, 2016 — /BackupReview.info/ — 4Sync, one of the world’s leading file-synchronization services, has introduced a killer web-feature – “4Sync Comment Pins”. According to the company announcement, the “4Sync Comment Pins” feature enables […]