Cannot erase usb stick mac


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Many users do not know the importance of the file system when it comes to storage devices. Everything would be simple if every operating system in the world accepted all file systems. Then you would be able to just use any file system and call it a day. However, that is not the case. A file system is like a set of rules that determine how data must be written to the storage device.

How to Format a Flash Drive on MacOS [Erase USB]

There are mainly 5 types of file systems available that are in common use. FAT32 : A file system that has been in business from the early s. They were once the goto file system for formatting windows based devices. It is the recommended file format for Windows computers, however, they are not suited for Mac OS. They are readable by both Windows and Mac devices. It was the most common Mac file format until APFS: This is the latest file format systems used by apple devices. APFS is only readable by Mac devices. Now, when you are formatting a USB drive on Mac, you have an important decision to make.

Whether the USB should be readable by windows machines and Mac machines or just by Mac and not readable in windows. If you want the storage device to only show up on Mac systems, then format your storage device with APFS. Go to the Disk Utility and open it. Terminal command line in Mac can be used to format USB devices. As always, having a backup option will save you when plan A fails for some reason.

Make sure that you enter the commands in the right syntax. Follow the guide given below for more info. Ensure that the device has been read by the computer. Step 2 Press Command and Spacebar simultaneously. Type in " Terminal " and press enter. Step 3 Type in the command diskutil list and this will display all the connected storage devices to your Mac. The command eraseDisk is used to completely delete the data in your USB device. It is an essential step before formatting and cannot be avoided.

The FAT32 file format can be replaced by other supported file formats. After the format process is over, you will see that that file format has now been changed to the FAT We are often asked how to recover files from USB devices because many users realize that they had important files on the USB drive only after formatting it. And this is just one reason among many why people lose data on USB drives. Data loss can happen to anyone at any time because our devices aren't perfect and this is the same case with us too!

How to solve it

Device failures and human errors make up a large part of the reason why we lose data from our devices. In such cases, the only thing you can do is use a powerful enough data recovery software. This brings us to Recoverit USB Data Recovery - the best option that you can choose to get back your files in no time. With constant updates and upgrades coming to Recoverit, make sure you get the latest version out there.

You can download the software from the official website.


  1. How to Format USB on Mac? Formatting External Hard Drive or USB Drive.
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Launch the software on your Mac and you will be greeted with a window that lists out all the storage devices connected to the Mac. From the listed options, choose the USB drive from which you want to recover the files.

Disk Utility erases, formats, repairs, and partition hard drives and SSDs

The software will scan the whole drive and you can restore the files that have been found by the software to your device. Recovering files from a device has never been this easier. With Recoverit Data Recovery, you can say goodbye to the worries that comes with losing a file. USB format on Mac can sometimes go wrong or you may accidentally delete some data. Many times we do not mean to erase something but do it mistakenly.

Then we wreck our brains looking for ways to get back the lost data due to USB format on Mac. Fortunately help is on the way as there are some programs that enable you to recover deleted data from USB drives. Download Mac Download Win. Thanks for your replies. I think you have your photos mislabeled. Reactions: chabig.

Longkeg said:. I was unable to format the drives on a Windows computer and also on an old Mac running OS 9. Both computers wouldn't recognize one USB drive and said that the other was write protected. I agree with Fishrrman. Your drives are probably toast. A final test would be to buy a new drive and reformat to Mac OS Extended right out of the box. Jul 30, 1, Colorado. Can you run First Aid on the disks?

How to Erase a USB on Mac OSX That Won’t Mount – plodacvimapo.gq

Reactions: Longkeg. Yes, the drives are probably bad, or at least have corrupt files that have made them shut down to save what's already there. As far as First Aid, when I use that on my Mac Mini running Yosemite the only option available is "verify disk", the other options for permissions and to repair the disk aren't even greyed out, they're just a black space.

Now I'm wondering if I'm using the right format. DVD's seem flakey as the surface is open to scratches like an old LP record. Now it seems that USB drives aren't all that safe. Or are they? Last edited: Apr 14, DeltaMac macrumors G3. Jul 30, 9, 2, Delaware.

Format An Unformattable Flash Drive In OS X

I have a couple of "real" hard drives that I use to back up files and installers. I have been using flash drives for about 20? I still have the first flash drive that I ever bought 64 MB. It still works, and has some old firmware for the original iMac G3, plus some other old stuff. When my 2nd ever flash drive started working VERY slow about 2 weeks after I bought it, I realized there must be be some natural limitations in that format.

As those flash drives became cheaper and cheaper, I also could tell that flash drives are NOT for archiving. They are made for daily use, as working tools. Make sure that you back up your software tools to reliable media, such as external hard drives. Two different storage drives are minimum, and a RAID setup shouldn't be one of those backups. Reactions: MSastre.

How to erase and format external disks on Mac

Sep 6, 5, 3, According to Sandisk, their drives go into a write protect mode when a fault is detected. Your drives just wore out I guess. Buy new ones and move on. Reactions: chown Thanks for the comments. I get the feeling that my USB drives aren't really worn out, they just need to be wiped clean and San Disk doesn't want to waste time on messing with it, but I do see on the link chabig posted about getting a replacement.

I have lots and lots of backups, probably well over a dozen because I put my main artwork files on our computers and "real" hard drives, I didn't realize that USB drives are thought of as less permanent than other media, but makes sense since they keep getting messed with. In that way maybe DVD's that you rarely use in a fire safe are not so bad. When I first started gigging with MIDI systems early 80's I made a lead box to hold the disks and kryptonite for a Commodore 64 we used because I didn't know if stuff like the driveshaft in the car and big speaker magnets would mess things up.

Turns out they don't and people would put floppies on bass cabinets that had 10 lb magnets and it didn't do anything. They don't have the reliability of "regular" hard drives. It looks like a regular optical DVD or BluRay disc, but uses a special non-dye layer that won't deteriorate over time as will dye-based optical discs. You also need the M-Disc media, of course.

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