# How Do I reformat aa locked Sandisk Extreme Portable Pro on Mac Big Sur

**URL:** <https://forums.sandisk.com/t/how-do-i-reformat-aa-locked-sandisk-extreme-portable-pro-on-mac-big-sur/209690>\
**Category:** Portable | Extreme | Extreme Pro SSD\
**Created:** [December 21, 2020, 12:35am UTC](https://forums.sandisk.com/t/how-do-i-reformat-aa-locked-sandisk-extreme-portable-pro-on-mac-big-sur/209690 "2020-12-21T00:35:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![GABarber](https://avatars.discourse-cdn.com/v4/letter/g/9dc877/32.png) [@GABarber](https://forums.sandisk.com/u/GABarber)\
**Post date:** [December 21, 2020, 12:35am UTC](https://forums.sandisk.com/t/how-do-i-reformat-aa-locked-sandisk-extreme-portable-pro-on-mac-big-sur/209690/1 "2020-12-21T00:35:57Z")

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I installed a Extreme portable Pro V2 2T on my mac (Big Sur OS) and setup the Security Unlocker. copied some files to the drive. When I tried to unlock the program repeatedly crashed,

I am trying to reform the drive so I can use it with security , but it wont reformat with the disk utility or using the Terminal feature. Ho do I reformat this drive…