Reliability & Data Loss

Dropbox has reorganized around Dash, an AI-powered search assistant, repeatedly describing its core file-sync product as 'mature' — leaving longtime users uncertain how much future investment the service they actually pay for will receive.

Long-running, widely reported complaints describe the Dropbox desktop client consuming excessive CPU, disk, memory, and battery — sometimes pinning processors above 100% and draining laptop batteries even when nothing is actively syncing.

Dropbox's 2019 redesign replaced its famously minimal sync-folder app with a heavy, Electron-based 'workspace' window — a Slack-like file manager that critics said abandoned the simple, reliable syncing that made Dropbox loved.

From 7 November 2018 Dropbox dropped sync support on Linux for every filesystem except unencrypted ext4, instantly breaking syncing for users on XFS, ZFS, ext3, Btrfs, and encrypted setups — making their data unavailable through Dropbox overnight.

Dropbox converted the long-standing Public folder into an ordinary private folder and then disabled all of its public links on 1 September 2017, breaking countless URLs people had embedded across the web with no automatic migration.

Dropbox's Smart Sync feature, meant to keep files 'online-only' to free local disk space, has repeatedly failed in the opposite direction — quietly re-downloading online-only files and filling up users' drives, or reverting their carefully chosen local/online states.

In January 2017 files and folders that users had deleted — in some cases as far back as 2009 — suddenly reappeared in their accounts, revealing that 'deleted' data had been retained on Dropbox's servers far longer than its own policy promised.

Researchers revealed that Dropbox's Mac client used a user's admin password to directly edit macOS's protected TCC.db permissions database, inserting itself into the Accessibility list — a privacy/trust list that grants near-total control over the machine — without a clear, informed prompt.

A flaw in Dropbox's desktop Selective Sync feature permanently destroyed the files of users whose client crashed or was force-quit mid-operation — including one photographer who lost more than 8,000 irreplaceable images. Dropbox compensated affected users with a year of Dropbox Pro.

On 10–11 January 2014 Dropbox went dark for roughly two hours after an internal maintenance error, while a group calling itself 1775 Sec falsely claimed to have breached it — a hoax that briefly stoked panic about user data.