260f542b__to_Good_Practice__RasterImg_2__Recommendations
[Format] .psd [Properties/Technologies] Adobe Photoshop document file, a proprietary format owned by Adobe. Primarily used for creating or editing images. [Description] The PSD format is highly flexible and is often touted as an 'industry standard' imaging solution. The format supports masks and layering, transparency, text and a number of other features making it an ideal format in which to create and edit images, it also supports EXIF, IPTC and XMP metadata. PSD has limited compression support and thus files tend to be large. [Recommendations] 
The PSD format is an ideal format in which to create and edit files but its proprietary and closed nature means that there is limited third-party support and it is unsuitable for long-term storage. Whilst copies of a file could be stored in the PSD format so that future editing (if desired) would be possible, migration of images to open uncompressed formats - i.e. TIFF- is advised for long-term accessibility.
Guides to Good Practice: RasterImg_2
Recommendations