## Types of digital materials

Photographs digitized for preservation purposes: digitized for preservation purposes: These include the high-resolution copies of digitized photographs that are in danger of deteriorating based on their age or make, specifically nitrate negatives or photographs which are oxidizing. These materials should be scanned at an appropriate resolution so they will not need to be scanned again if requested by a user. (It is recommended these materials should be scanned at 2400 dpi, with 10 inches on the long edge). Low resolution copies of these items should also be created to make them more easily accessible in the Drive 3. Where to save these items: The high resolution copies should be saved in Drives 1 and 2. It is recommended to save the low resolution copies in all of the drives (Drives 1, 2, and 3), as they can take a while to create, especially if there is a lot in one collection. All items within each drive should be saved in the appropriate collection folder, under the sub-folder “Digitized\_for\_preservation”.

Photographs digitized for reference: digitized for reference: These are digitized copies of photographs within our collections where a high-resolution digital copy has been requested by a researcher. Where to save these items: These should only be saved within the Drives 1 and 2. They should be saved in the appropriate collection folder, under the sub-folder “Digitized\_for\_reference”.

Documents digitized for reference: digitized for reference: These should only be saved when the whole folder has been scanned. This also includes anything that has been scanned for reference purposes that had to be redacted. For naming redacted files please put “-redeacted” in the file name. For example: “uaa-hmc-0001-b2-f03-redacted”. Where to save these items: These should be saved in the Drives 1 and 2. They should be saved in the appropriate collection folder, under the sub-folder “Digitized\_for\_reference”.

Audio, video, and film digitized for preservation: video, and film digitized for preservation: These should include both the high resolution and low resolution digitized copies of the A/V materials. In the case of video and film, high resolution should be AVI files, and low resolution should be MP4 files. For audio files, high resolution should be WAV master files and 192 kbps MP3 files. Where to save these items: Both the high resolution and low resolution digital copies should be saved in Drive 1, and only the low resolution copies should be saved to the Drive 2 and Drive 3. They should be saved in the appropriate collection folder, under the sub-folder “Digitized\_for\_preservation”.

Born digital documents: digital documents: Born digital documents that were digitized by the donor (whether or not they donated the original items as well), and items created electronically. Where to save these items: Drives 1 and 2 should include all original items, as well as Drive 3. They should be saved in the appropriate collection folder, under the sub-folder “Born\_digital”. Note: It is not usually necessary to lower the resolution or compress these files in order for them to be browsable in Drive 3.

Born digital photographs: digital photographs: Born digital photographs include photographs digitized by the donor or created electronically.