Wiktionary
vb. 1 (context intransitive computing English) To enter a dialog box where the user can specify a filename, and such that when the filename is specified, an appropriate file will be saved with that name (even if it already has a different name). 2 (context transitive computing English) To specify a (possibly new) filename for a file, and save it under that name.
Usage examples of "save as".
The world for all its solid substance and complexity no longer existed for his soul save as a theorem of divine power and love and universality.
Thursday and Friday were uneventful, save as they marked improvement in our patient.
Even if some mapping routine had done it for her, he supposed, it would have meant nothing, save as an example of convergent processes in geology.
Their ruthlessness derived from their own traditions: illiterate nomads, they saw no purpose in agriculture, no value in cities save as mines of plunder—.
No one shall enter space save as a licensed member of a crew of a chartered vessel, or as a paying passenger of such a vessel under such regulations as may be issued pursuant to this act.
Of course the lower stories of all houses had to be abandoned, save as diving baths, but it was a simple matter to add others.
She swayed in his hold, trying to win to her feet, paying no attention to him save as a hindrance against her answering that demanding call he could not hear.