WD Backup: "Not Enough Space"

IMPORTANT: WD Backup End of Support Notice!
WD Backup has reached its end of support life cycle.

Need more help?

Acronis True Image for Western Digital can be used instead.
Answer ID 6550: Install and Uninstall Acronis True Image for Western Digital on Windows.

Download of this software provides a 5-year license to use it with your compatible drive. This software is available only under a limited time offer and must be redeemed by download and install within 90 days of purchase or by December 31, 2025, whichever is earlier. This offer may not be combined with other offers and is subject to change. Terms and conditions apply.

Use of this software requires download and installation to a system connected to at least one of the compatible Western Digital (WD, SanDisk, G-Technology) storage products. When using with the My Cloud NAS products, the software must be running from an operating system on the same local network.

Acronis True Image for Western Digital will only backup files and folders physically stored on the local drive. It will not backup or pull data hosted remotely in Cloud Services such as Dropbox, Box, Google Drive, OneDrive.

Description

WD Backup displays a message, "Unable to back up files to because there is not enough space" under the following conditions:

Creating the first backup plan on WD Backup Version 1.9.6485 and below
Starting backups of an existing backup plan

WD Backup maintains a second copy of the backup for data recovery purposes.
It also requires additional disk space for pruning older backups from existing backup plans.

EXAMPLES:

If there is a 1 TB My Passport external drive, WD Backup can only process 465 GB of data because it requires two times (2x) the disk space to create the backup plan. (465 GB + 465 GB = 930 GB)

If the computer has 1.25 TB of data, WD Backup will need at least 2.5 TB of of external USB storage to create a backup plan.
(1.25 TB + 1.25 TB = 2.5 TB)

Please refer to the table listed below to determine the amount of external USB storage required for WD Backup.

* the information listed in the table are for reference only.

Computer Data	WD Backup Required Disk Space	Min Recommended Drive Capacity
500 GB	1 TB	2 TB
1 TB	2 TB	3 TB
1.5 TB	3 TB	4 TB
2 TB	4 TB	5 TB
2.5 TB	5 TB	6 TB
3 TB	6 TB	7 TB
3.5 TB	7 TB	8 TB
4 TB	8 TB	9 TB
4.5 TB	9 TB	10 TB
5 TB	10 TB	11 TB
5.5 TB	11 TB	12 TB
6 TB	12 TB	13 TB

Resolution

Please select one of the solutions listed bellow for WD Backup.

First Backup Plan

Open a web browser to support.wdc.com/downloads

Download and install the latest version of WD Backup
OR
Download and install WD Discovery for Windows
Install or upgrade the WD Backup App from within WD Discovery

Existing Backup Plan

Open a web browser to support.wdc.com/downloads

Download and install the latest version of WD Backup
OR
Download and install WD Discovery for Windows
Install or upgrade the WD Backup App from within WD Discovery

Delete or remove content from an existing external USB drive to ensure there enough disk space is avaiable for WD Backup.
Obtain a larger capacity external USB drive
Reduce the size of the backup to at least half of the free space available on the drive in usng the steps below.