I have a problem to format/erase an usb drive with mac os x on it. It shows that drive is read only. SanDisk usb disk

Read only?

disk verifying

SanDisk Cruzer Force Media

Is there any way that I can format/erase disk to become writable?

  • yes I'm log in as admin
    – Andrej
    Sep 26, 2014 at 12:11

1 Answer 1


i remember this from a few years ago -- there were a lot of these slipping into RO mode. here is a forum talking about it: http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/Sandisk-cruzer-16GB-became-read-only/td-p/255218/page/2

with no real solution. it is a hardware issue, regarless of operating system etc.

  • usb key is dead ...
    – Andrej
    Nov 13, 2015 at 22:23

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