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Filename extension
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Informations about the HDD filename extension and the file formats associated with it

We collected the information you should know about the .hdd filename on this page. If you were sent a(n) .hdd file in an e-mail, but you don’t know what to do with it, then you can find help here. We strive to suggest free, open-source applications that are available to everyone for the file formats.

2 filename extension(s) are in our database

.hdd - HotDisc Designer Document

The HDD file is a Document file, which is connected to the HotDisc Designer Document according to our registry. With the adequate settings, the HotDisc Designer Document (.hdd) files can be opened or converted with the help of Iomega HotBurn.

Format description:
HDD format description not yet available
Iomega HotBurn
Magic string:
- / -
Related links:
Related extensions:
DynaCAD v4 Parts Document
Lotus 1-2-3 Worksheet
gOpenMol Model
Microsoft Works Document Backup
GPG/PGP Signature
Adobe Premiere 6 Storyboard

.hdd - General Hard Disk Image

The HDD file is a Disk Image file, which is connected to the General Hard Disk Image according to our registry. With the adequate settings, the General Hard Disk Image (.hdd) files can be opened or converted with the help of UFS Explorer.

Format description:
HDD format description not yet available
Disk Image
UFS Explorer
Magic string:
- / -
Related links:
Parallels Desktop for Mac
Related extensions:
General Floppy Disk Image
UFS Explorer Compressed Image
UFS Explorer IntelliRAW Rules

Important! Programs other than the ones listed above may also use the .hdd file extension. Even harmful programs can create files with the .hdd extension to store data in them. Always be careful with .hdd files coming from unknown sources. Don’t open executable files that arrived in mails, even if you know the sender.

The .hdd file can’t be opened on your computer?

If the program necessary for opening the .hdd file is installed properly on your computer, then the quickest and simplest way to open the .hdd file is to double-click on the file’s name. If that doesn’t work, then the right software probably isn’t installed on your computer.

While opening the .hdd file, you may receive an error message from the associated application, this can be caused by the following:

Incorrectly given .hdd extension

The .hdd filename extension can be given incorrectly sometimes. The cause of the error could be a mistake or a simple typo. We found the following incorrectly given filename extensions that are the most frequent in the case of .hdd files.

jdd, bdd, hwd, hfd, hdx, hdv, hdr, ydd, hde, tdd, hcd, mdd, dd, hxd, hrd

Maybe you’re not even looking for the .hdd file extension?

It’s possible the the file’s extension was given incorrectly. Below, we list some filename extensions that are similar to the .hdd extension. It’s possible that the one you’re looking for is among them.

CARA Sound Radiation Data
SmartWare Hardware Driver
YANG Designer Document
Motion Designer Document
HRS Pro Encrypted Secure File

Associated applications

The Windows operating system stores information about the applications associated to the file extensions in the registry database. The associations can be queried or modified in the Command Prompt window with the "assoc" command.

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We gladly accept application suggestions, but our primary goal is to suggest reliable, open-source applications that can be freely distributed to the users.

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