# Crashplan is out - Looking for alternative for 3-2-1 backup scheme

**URL:** <https://forum.duplicati.com/t/crashplan-is-out-looking-for-alternative-for-3-2-1-backup-scheme/176>\
**Category:** Support\
**Created:** [August 22, 2017, 7:27pm UTC](https://forum.duplicati.com/t/crashplan-is-out-looking-for-alternative-for-3-2-1-backup-scheme/176 "2017-08-22T19:27:06Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![anon8404338](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/a/a4c791/32.png) [@anon8404338](https://forum.duplicati.com/u/anon8404338)\
**Post date:** [January 10, 2018, 12:48pm UTC](https://forum.duplicati.com/t/crashplan-is-out-looking-for-alternative-for-3-2-1-backup-scheme/176/14 "2018-01-10T12:48:39Z")

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Just a small remark. When an external disk for backup is not available, it will on MacOS (and probably other unix-like environments) not simply fail but instead create a new backup directory where you do not want it but then fail because that directory is not in sync with the local database. The new directory may (on MacOS ‘will’ — in case of automount) then prevent the disk to mount properly, leading to permanent failure of your backups. To prevent this from happening, some special configuration settings are available, see [MacOS USB destination confusion](https://forum.duplicati.com/t/macos-usb-destination-confusion/1817) (which should be instead called ‘non-permanent disk availability on non-Windows issues’.

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