Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to protect your computer from ransomware [title] Invest in a removable drive. [step] When used strategically, an external hard drive is among the most effective backup tools at your disposal. Only plug it into your machine when you back up files, and go offline during backups.

Ending1: This will allow you to bring more data into and out of the drive, rather than storing it as you are booting up the machine. [substeps] External hard drives should have a built-in usb (one that would sync each time you boot up the machine) adapter. Ending2: External drives can also give you a combination of memory and software which will allow you to store malware files in an sd card or usb (optical drive) case rather than a backup case. [substeps] Where possible, see the picture above instead of having to purchase a hard drive with removable storage. Ending3: [substeps] If you keep your external drive connected to the computer while it's online, it could become hijacked along with your computer during a ransomware attack. [title] Store your files with a secure cloud-storage service. Ending4: The portable hard drive can be purchased for as little as $20. This provides security and can be used mainly for internet browsing and streaming.

Answer format: ending1/ending2/ending3/ending4