I just bought a Intenso hard drive and its asking me to erase it before using time machine. should i erase the disk?

Hi all.
I just bought a T1B Intenso Hard Drive.
Plugged into my MacBook Pro and TimeMachine instantly pops up asking me if i want to back up.
I do, so I accept and encrypt it.
However, a message appears and asks me if I want to erase the disk (nothing is on there) to be able to continue.
Should I erase the disk?
Will it corrupt the files saved on it?
Thanks all.
±Adam±

Have you already formatted the drive using Disk Utility? If you erase the drive then, yes, you will lose all data on the drive.
If you want to use the drive as a Time Machine volume, however, you MUST format the drive as "Mac OS Extended (Journaled)" using Disk Utility (Applications>Utilities folder).
Good luck,
Clinton
MacBook Pro (15-inch Late 2011), OS X Mavericks 10.9.5, 16GB Crucial RAM, Crucial M500 960GB SSD, 27” Apple Thunderbolt Display

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I just bought a Intenso hard drive and its asking me to erase it before using time machine. should i erase the disk?

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