LaCie Rugged USB-C User Manual
LaCie Rugged USB-C User Manual

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Optional Formatting and Partitioning

You can use LaCie Setup Assistant to format your LaCie hard drive when it is first connected to a computer (Mac or Windows). LaCie Setup Assistant helps you to quickly format the storage device according to your needs.

Read the information below if you:

  • Aborted LaCie Setup Assistant while it was formatting.
  • Want to reformat your storage device after successfully formatting the hard drive with LaCie Setup Assistant.

About file system formats

NTFS: since it is the native file system for Windows, volumes created in NTFS are read and write with computers running Windows. Mac OS can read NTFS volumes but cannot natively write to them.
Mac OS Extended (HFS+): the native hard drive file system for Mac. Windows cannot natively read or write to HFS+ (journaled) hard drives.
exFAT: generally compatible with Mac and Windows. exFAT is not a journaled file system which means it can be more susceptible to data corruption when errors occur or the drive is not disconnected properly from the computer.
FAT32: compatible with Mac and Windows. However, FAT32 is a legacy file system designed for low capacity hard drives and it is not recommended for modern hard drives or operating systems. A FAT32 partition can reach up to 32GB when formatted on a Windows PC.

How to choose the file system format

Use NTFS if:

…the storage device is connected to Windows PCs.

Use HFS+ if:

…the storage device is connected to Macs.

You can use exFAT if:

…the storage device is shared between Mac and Windows computers.

Use FAT32 if:

…the storage device is connected to older Windows and Mac computers. FAT32 is not recommended for modern operating systems and computers.

Formatting instructions

The steps below help you format and partition a storage device.

  Caution: Formatting erases everything on the storage device. LaCie highly recommends that you back up all data on your storage device before performing the steps below. LaCie is not responsible for any data lost due to formatting, partitioning or using a LaCie storage device.
  Note: Refer to your operating system's documentation for more information on formatting and partitioning storage devices.


  1. Make sure the storage device is connected to and mounted on the computer.
  2. Go to Search and then type diskmgmt.msc. In the search results, double click Disk Management.
  3. From the list of storage devices in the middle of the Disk Management window, locate your LaCie device.
  4. The partition must be available to format. If it is currently formatted, right click on the partion and then choose Delete.
  5. To create a new partition, right click on the volume and select New Simple Volume. Follow the on-screen instructions when the New Simple Volume Wizard appears.


  1. Make sure the storage device is connected to and mounted on the computer.
  2. Select Go > Utilities in the Finder menu bar.
  3. In the Utilities folder, double-click Disk Utility. 
All connected storage devices, partitions or disk images are displayed in the left column.
  4. Select the LaCie hard drive in the left column.
  5. Click the Erase tab.
  6. Choose a format from the drop-down window.
  7. Enter a name for the volume.
  8. Click Erase and confirm your selection in the pop-up window.