Name conventions are essential to successful graphic design. It is important that you follow these rules and conventions when naming your files. Be descriptive. Summarize what the file is in the name:
Use proper suffixes for your files
Files must be labeled according to their file format: .ae, .psd, .gif, .png, .jpg, etc.
Avoid using character spaces within filenames
It is common to use an underline character or hyphen to visually separate words within filenames, such as robbins_bio.html or robbins-bio.jpg.
Avoid special characters
Avoid using characters such as ?, %, #, / , : , ; , •, etc. Limit filenames to letters, numbers, underscores, hyphens. and periods. It is also best to avoid international characters, such as the Swedish Å.
Filenames may be case-sensitive
This depends on your server configuration. Consistently using all lowercase letters in filenames , although not required, is one way to make your filenames easier to manage.
Keep filenames short
Long names are more likely to be misspelled, and short names shave a few extra bytes off the file size. If you really must give the file a long, multiword name, you can separate words with hyphens, such as a-long-document-title.ae, to improve readability.
Self-imposed conventions
It is helpful to develop a consistent naming scheme for huge sites-for instance, always using lowercase with hyphens between words. This takes some of the guesswork out of remembering what you named a file when you go to link to it later.