Tech Tips Home
The Best Tech Tips And Daily Deals
Newsletter On The Internet!

WorldStart Tech Tip And Store Search
Email: Password: Login Remember Me

Like what you see here? Subscribe to the Tech Tips newsletter!   Email: Subscribe

Formatting Flash Drives On Mac OS

Saturday, April 11th, 2015 by | Filed Under: Mac OS

We get a lot of questions about flash drives. Like this question from Jim. He just bought a 128 GB flash drive for doing backups, but he has a question about his other drives.

“I have several others of less GB, it is possible to erase these and reuse them? How can I do this on my Mac OS? I hate to destroy these and throw them away.”

We’ve got good news for you, Jim!

Sure you can delete what is already on the flash drives. There are a few ways to this, but first be certain to copy what is already on the flash drives to another location before doing anything, so that you are certain you have saved copies of that information.

Since you’re on a Mac, the easiest way to get rid of the files is the put the drive into a USB port on your computer, then drag the files to the trash. You can even use select all by clicking into the drive, hitting the Command and A key, then dragging all files at once to the trash.

Another option is to format the drives. Put the flash drive into the computer. Go to Finder, Utilities, and the choose Disk Utility. Click the flash drive on the left of the screen. Click the Erase tab on the right pane, then click Format from the drop-down menu.


Select the file system beside Format, usually you want to choose FAT for 32GB and smaller drives or ExFAT for larger drives. This format allows use on both Apple and Windows computers. You can choose Mac OS Extended (Journaled) if you are using the drive strictly for Mac OS. Click erase at the bottom and confirm your choice. This will erase anything on those drives and clear them for future use.


~ Audra

Tags: , ,

One Response to “Formatting Flash Drives On Mac OS”

  1. Jigs says:

    I could not ERASE using all the above mentioned options. Volume Earse failed with Error “Could not modify partition map”

Leave a Reply

Like these tips? Get them for FREE in your email!

WorldStart's Tech Tips Newsletter

  • Tech Tips Daily - Become a tech pro! Get the very best tech and computer help sent directly to your email every weekday!

  • Tech Tips Weekly - If you don't want our Tech Tips newsletter every day, then sign up for this weekly newsletter to get the best information of the week. Sent on Fridays.

Other Newsletters

  • WorldStart's Daily Deals - Every week, we send out great deals in our Daily Deals newsletter. Many of these deals are exclusively for our Daily Deals newsletter subscribers and can't be found with our regular specials.

  • Just For Grins - Each issue includes a couple clean jokes, some funny quotes, and a hilarious reader's story. Newsletter is sent five days a week.

Enter Email Address:


Your e-mail address is safe with us!
We only use it to send you the newsletters you request. It is NEVER disclosed to a third party for any reason, ever! Plus, if you decided you don't like our newsletters (don't worry, you'll love them), unsubscribing is fast and easy.

Free Newsletter Signup

Tech Tips Daily

Become a tech pro! Get the very best tech and computer help sent directly to your email every weekday!

Tech Tips Weekly

The week's best in tech and computer help. Get your issue sent to your email every Friday!

WorldStart's Daily Deals

The very best deals on the Internet! Get a new set of incredible sales every day of the week!

Just For Grins

Clean jokes, funny quotes, and hilarious comics. Sent 5 times a week straight to your email.


Love Worldstart? Refer A Friend!

WorldStart's Premium Membership

Tip Archive