noun
save destination; save location
Computing term for the folder, directory, or path where a file is saved.
ファイルの保存先をデスクトップに指定してください。
Please set the save destination for the file to the desktop.
保存先のフォルダが見つかりません。
The save location folder cannot be found.
保存場所 is a more general term for 'storage location', while 保存先 is commonly used in computing contexts for file save destinations.
Compound of 保存 (ほぞん, 'save') + 先 (さき, 'destination'). The exact historical derivation is uncertain, but the word follows a common pattern for technical terms.