Comments on: How to password protect & encrypt a USB flash drive for Macs

By: Adam

Adam — Sun, 29 Jan 2012 23:07:06 +0000

ali did you put it the key chain if you did the computer will atomically reconse it since that’s what a key keychain

By: Toby Thaler

Toby Thaler — Thu, 19 Jan 2012 02:24:55 +0000

Sebastian–Did you try wiping the whole thing (“erase volume”) using Disk Utility?

By: Toby Thaler

Toby Thaler — Thu, 19 Jan 2012 02:22:30 +0000

I thought dmg lost the password protection as well because the computer didn’t ask for it when I opened it up. However, it did work when I moved the thumb drive to another computer without the password saved in the keychain. Try that, and also maybe try not saving password in keychain (but what’s the point of that on your own computer?).

By: Ali

Ali — Sun, 15 Jan 2012 23:01:00 +0000

Password never worked.

By: bill

bill — Mon, 12 Dec 2011 01:16:35 +0000

How can I encript my usb drive if it is used betweem both a mac and windows operating system.

By: Sebastian

Sebastian — Sun, 25 Sep 2011 17:40:45 +0000

This didn’t work for me. I have a 3.77 Gigabyte usb drive, and did everything you did the way you said to. I even named the thing Files as well. I made the “Files” file 3 Gigabytes. I set the password and everything. Now, when I try to open it, it doesn’t do anything. It just opens up a window that says “Warning The following disk images failed to mount. Image: Files.dmg Reason: no mountable file systems”. I couldn’t delete “Files.dmg” for a while, or erase my usb again to get rid of it. I finally got to delete “Files.dmg” but it still says that there’s 0.77 Gigabytes of Storage left. I really don’t know what to do can anyone help me?!?!

By: susanH

susanH — Wed, 21 Sep 2011 14:07:23 +0000

Thanks for the clear instructions – worked fine except that when i put my flash drive back in my computer, it doesn’t ask for the password…

By: guy Thijskens

guy Thijskens — Thu, 16 Dec 2010 15:00:43 +0000

Very usefull thank you!

By: dan

dan — Sat, 13 Nov 2010 04:00:19 +0000

This doesn’t work for me. I get an input/output error message when trying to create the disk image.

By: Stuart-S

Stuart-S — Thu, 22 Jul 2010 19:58:30 +0000

Ant,
I have followed your instructions to the letter here and I’m afraid it isn’t working for me.
Although every step seems ok, it’s only when I attemp to open the USB, having done all the erasing and formatting, etc as per your steps 1-10, that it’s obvious something’s not right.
I click on the dmg and it doesn’t open. It doesn’t ask me for a password, even though I successfully set one.
Any ideas?
Thanks
Stuart

By: Ant

Ant — Fri, 09 Apr 2010 01:33:00 +0000

Ricardo,
The idea behind formatting the drive as HFS+ is that the encrypted DMG is generally not compatible with Windows. So leaving the partition as FAT has no real benefit, unless you’re only encrypting part of your partition and using the other data on Windows machines. Otherwise using HFS+ might be faster or more reliable – at least in my experience. Thanks for commenting!

By: Ricardo

Ricardo — Thu, 08 Apr 2010 12:54:45 +0000

I don’t understand the need to format the pendrive as HFS+, except if your dmg is greater than 4gb.