The MacBook and MacBook Pros come with an SSD to store data and an OS. When you use a hard disk drive, Time Machine will take a while to back up your Mac. You can get an external SSD (Samsung T5 500GB $89.99 from Amazon) and format for a decent price to use with your Mac’s Time Machine. The SSDs are fast, don’t need any external power.
Also Read: How to Record Your Mac’s Webcam Video Steps to Modify the Time Machine Backup Schedule for MAC: #1 To be clear you must be knowing that the backup time interval cannot be changed from within the Time Machine Backup settings or the preferences. A Guide to Using Apple Time Machine and your NAS Apple Time Machine is a backup software application included with macOS operating system from Apple. The software is designed to work with their range of AirPort Time Capsule devices, the Wi-Fi router with built-in hard disk (which apple are pulling out of), as well as other internal and external disk drives connected.

Backing up your Mac is simple and important. We recommend it for everyone.
Back up with Time Machine

Time Machine is the built-in backup feature of your Mac. It’s a complete backup solution, but you can use other backup methods as well.
Create a backupStore files in iCloud
You can also use iCloud and iCloud Drive to store files, such as your photos, documents, and music.
Set up iCloud and iCloud DriveRestore your Mac from a backup
When you have a backup, you can use it to restore your files at any time, including after the original files are deleted from your Mac.

Prepare your Mac for service
Making a backup is an important part of preparing your Mac for service, especially because some types of repair might require erasing or replacing your hard drive.
Get your Mac ready for serviceHow much space do I need for a backup?
To see the size of a specific file or folder, click it once and then press Command-I. To see storage information about your Mac, click the Apple menu in the top-left of your screen. Choose About This Mac and click the Storage tab. For Time Machine backups, it's good to use a drive that has at least twice the storage capacity of your Mac.
Related topics
Free up storage on your Mac
macOS can save space by storing your content in the cloud. This isn't a backup, but it includes new tools to make it easier to find and remove large or unwanted files before you make a backup.
Use Optimized Storage in macOSErase or format a storage device
Time Machine For Macbook
You can use Disk Utility if you need to erase or format a storage device.
How To Configure Time Machine
Learn how to use Disk UtilitymacOS Community
If you can't back up your Mac
Time Machine Mac How Does It Work
We'll find the best support options for you.