Externatl Drive 2tb but Time Machine Reading as 1tb

Having regular backups of your Mac is a necessity, and there is really no easier way to consistently back up your Mac than by using the excellent Fourth dimension Machine feature of Bone 10. But with the enormous size of external hard drives and their prices becoming cheaper and cheaper, it's not e'er necessary to dedicate an entire gigantic hard disk drive but for Fourth dimension Machine backups, particularly if your Mac has a smaller hard drive and thus the backups won't take up that much space in general. For these situations, configuring the single external hard deejay to have dual employ is an excellent choice. The end result will be an external storage drive split into 2 partitions, 1 to exist setup exclusively for Fourth dimension Machine backups, and another division intended for typical file system admission and file storage.

The basic process may be familiar to Mac users who have setup drive partitioning and backups earlier, only nosotros'll cover every step to be sure everything is configured correctly.

Requirements

• Whatever Mac running Bone X with Fourth dimension Automobile back up (every modern version)
• Large external hard drive (check out this Amazon bargain)
• Minor patience, and virtually ten minutes for initial setup

Note on buying external hard drives: it's almost ever cheaper to buy a generic external difficult bulldoze and format it yourself to be Mac uniform. Drives that are pre-formatted for Os X are ordinarily no different than a standard external drive, other than having a higher price tag.

Step 1: Format the Drive to "Mac OS Extended" Compatibility

The kickoff prepare of steps involves formatting the drive. You lot can sectionalisation a drive without formatting, but we'll cover this process anyhow considering many third party difficult drives ship with Windows-centric FAT32 or NTFS file systems which, while they are compatible for dual use with both Mac and Windows, are not compatible for using as a Time Machine drive, and as they are not exclusively formatted for the Mac, will accept other limitations which are not desirable for exclusive Mac Os X usage.

This process will erase all data on the difficult bulldoze, meaning this is best to pursue when you lot get-go get a new external bulldoze for backups and file storage.

1. Connect the external difficult drive to the Mac
2. Launch Disk Utility, found in /Applications/Utilities/
3. Select the external difficult drive from the bulldoze list on the left, then click the "Erase" tab
4. Choose "Mac OS Extended (Journaled)" as the format type, ignore the naming convention for now, then click "Erase" and confirm the bulldoze will be erased

How long it takes to format a drive depends on a variety of factors, including drive speed, interface speed, and full disk size. Just allow the process go, don't be surprised if information technology takes a few minutes.

Footstep 2: Create Two Partitions for Time Machine & Storage

Next nosotros'll gear up the external difficult disk to have two split partitions, one for the Time Automobile backups and the other for regular file system admission.

A quick note well-nigh sizing: It is skillful exercise to prepare the Time Machine bulldoze to be at least 2x-3x your master hd size. For example, if the Mac has a born 128GB SSD drive, setting the Time Machine partition to exist at to the lowest degree 384GB or larger would be ideal. You lot can certainly get away with smaller sizes, but because Time Machine takes incremental snapshots of the data on your Mac, the backups will only capture more data for a longer period of time if the segmentation size is larger. To be articulate, backups will not cease once the maximum space is reached, it will simply rewrite older backups, thus preventing admission to old drive states equally they become rewritten. We're going to utilise an even 50/50 division scheme for this example (specifically, a ane.5TB drive split into two 750GB parts) though you lot can configure yours as advisable.

1. When the drive has finished formatting, choose the "Partition" tab
2. Pull down the "Partition Layout" menu and select "2 Partitions" to split the drive into two equal division sizes divided 50/50
3. Adjust the division size allotment if desired by dragging the boxes to accommodate size, or past manually selecting a partition and inbound a desired resource allotment in the "Size" input box
4. Name the two partitions accordingly, select the first partition and name information technology something similar "Time Machine Backup", and so select the other segmentation and proper noun information technology something similar "File Storage"
5. Choose "Apply", then confirm the changes by clicking "Partition" when asked

Partitioning a drive can take a few minutes, depending on the total capacity of the disk. Once that procedure is finished y'all can quit out of Deejay Utility.

Step 3: Set Fourth dimension Machine to Backup to a Specific Division

With the well-nigh technical aspects at present finished, you can specify the sectionalization to become the Time Machine backup. This volition too initiate the first backup of the entire Mac with Time Machine, which is normally the lengthiest backup since it's going to support every single affair.

1. Go to "Organization Preferences" from the  Apple menu and and so choose "Time Machine"
2. Click the "Select Disk" button and let the listing populate
3. Choose the partition named "Time Auto Backup" from the listing, and so confirm the pick by clicking "Use Backup Disk"
4. Let Time Auto backup for the outset time

While yous're in the Time Auto settings, you can cull to encrypt the backups past checking the appropriate box (yeah, you tin encrypt them later if you lot change your mind), and you tin also exclude files or folders from the backups through unproblematic drag and drop specification past way of the "Options" button if desired. The default configuration remains unencrypted and excludes nothing, which is satisfactory for many employ cases.

Again, the first initial backup process will take quite a while since the entire Mac is existence backed upward. Permit the unabridged procedure run through its class, this may exist best done overnight if the primary Mac hard drive is enormous since it can several hours to perform the initial backup. Backups performed afterwards the initial sequence will be much faster and smaller, because they volition be delta backups, focusing on files that have been added, deleted, or changed from the Mac, rather than simply copying the unabridged bulldoze and it'southward untouched contents over and over again.

All done! Piece of cake backups and access to classic file storage are skilful to go

At present that everything is setup you lot will have one partitioning automatically serving as the fill-in drive, and the other accessible every bit usual through the file arrangement for general file storage of things like movies, large video collections, pictures, media, downloads, or whatever else. How to differentiate between the ii drives? Other than the obvious proper noun differences that were specified during configuration, you'll notice the icons serve every bit an indicator of which sectionalization/bulldoze does what purpose. The normal file organisation storage partition will have a standard orange external drive icon, and the Time Car segmentation volition have a light-green icon with the backup logo on it.

Accessing the standard file organisation segmentation is done through whatever Finder window, where it will appear in the sidebar under "Devices", or if y'all have bulldoze icons set to show up on the desktop, it volition appear there.

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Source: https://osxdaily.com/2013/05/01/use-single-hard-drive-time-machine-and-file-storage/

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