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Careful not to backup the malware infection though...

• wlesieutre 11y ago
  Of course, and if you only have the one backup drive, be wary of connecting it to an infected computer with read/write access. Link posted in another comment suggests that this malware has encryption of Time Machine backups in development (should be safe this time around?). Safer option would be to create a write-only network share on another computer and copy files to that.