1 Dell PCs that were downgraded to Microsoft Windows 7 at the factory were shipped with the hard drive set to MBR (Master Boot Record) format. Remember that if you want, you can create more partitions in your USB but you must choose the correct format for each one, in order to be able to read it on multiple SO.Check if mbr or gpt linux. Finally just click Apply and you should have your USB formatted. Then rename your partition with your favorite name, and select format (I recommend you Exfat because it can be read both Windows and Mac and is much better that Fat32 since it has no 4GB limit for files) In order to remove one of them just click in "-" button, and you should see how all the usb has now only one partition. You should see the chart divided in two (EFI and Microsoft Basic Data partitions of your USB). If you click on it, you should see something like this: Once you have selected the device, partition option in the top menu will be enabled. Select your USB in the left menu (Select the device not the partition) (It is in your Utilities folder inside of Applications). Your problem is that you have two partitions and Windows is not able to read one of them by its extension. What is the cause of that ? How do I prevent it ? When I plug that drive into a Mac, I got it to display fine with full capacity.īut when I plug it into my Windows PC, I kept seeing this EFI partition - not the other one. Result of diskutil in Terminal /dev/disk0 (internal, physical):Ģ: Apple_CoreStorage Macintosh HD 499.4 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3Ġ: Apple_HFS Macintosh HD +499.1 GB disk1Ġ: Apple_partition_scheme +205.1 MB disk2Ģ: Apple_HFS Google Chrome 205.1 MB disk2s2Ģ: Microsoft Basic Data USB 3.0 31.8 GB disk3s2 How do I force format my flash drive back to its original size on a Mac OS X 10.11 ? I want to format them.īut they seems to stuck in 200 MB EFI mode partition or something like that,Īnd no matter what, I can’t seem to format it back to it original size ( 32 GB). I've tried to build a bootable images USB flashdrive on 2 of my flash drives, now I want use them as a storage again.
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