Adobe Acrobat Pro subscription included with external hard drive for iMac

The manufacturer isn't actually offering you anything. You can sign in to Adobe and start any of their apps for a free 30 day trial period. After which, if you don't cancel, it then automatically turns into a subscription.

But as MrHoffman noted, you should simply erase the drive and prepare it for use with a Mac. Do not even think of using any of the junk utilities they love putting on drives.

As you should do anyway, erase the hard disk drive using Disk Utility.

Erasing and formatting erases the contents.

macOS does not have an analog to the Windows ”autorun.inf” feature; a mechanism that runs automatically runs some app from the newly-connected storage device.

No hard disk vendor add-on apps are needed for normal use, as well.

I just see that StackSocial is offering a bundle for $89.

1. Office 2021 Pro for Windows
2. Adobe's 3-year license to use Adobe Acrobat Pro 2024
   1. Mac or Windows
   2. Not a subscription. Adobe now allows one to pay a one-time fee $324 for that three-year usage, or a bargain if obtained in this bundle.

You should always erase the whole physical drive especially if it is brand new so that it creates a proper & compatible macOS partition table & file system. Manufacturers have been known to use odd style partitioning layouts & formatting, plus they will sometimes place things in a hidden area at the beginning of the drive......those items can sometimes cause problems with an OS.

In addition, it can reveal whether someone is trying to rip you off by selling you a fake or old drive.....this is a new common issue when buying from Amazon third party marketplace (or other similar third party marketplaces most major vendors have added to their site).

Here is an Apple article with instructions for erasing the whole physical external drive:

Erase and reformat a storage device in Disk Utility on Mac - Apple Support

$89 is a great three year price on Acrobat Pro! If I didn't already have Master PDF Editor, I'd grab a license.