The first time you save a spreadsheet, you name it and choose where to save it—on your desktop or in a folder, for example. Thereafter, Numbers automatically saves your spreadsheet as you work. You can rename a spreadsheet at any time or create a duplicate of it with a different name.
Click anywhere in the spreadsheet window to make it active, then choose File > Save (from the File menu at the top of your screen).
Enter a name in the Save As field, then enter one or more tags (optional).
To choose where to save the spreadsheet, click the arrow next to the Save As field, then choose a location (for example, a folder or your desktop) in the dialog you see.
To make the spreadsheet appear in Numbers on all of your iOS devices set up with iCloud drive, save the spreadsheet in the Numbers folder in iCloud Drive. (To see this option, iCloud Drive must be set up on your Mac.)
Tip: To create a new folder for the spreadsheet, choose a location for the folder, then click New Folder at the bottom of the Save As dialog. Enter a name for the folder, then click Create.
Click Save.
By default, Numbers saves your spreadsheet as a single file. If your spreadsheet is over 500 MB, Numbers may perform better if you save the spreadsheet as a package.
Save as a package file: Click anywhere in the spreadsheet window to make it active, then choose File > Advanced > Change File Type > Package (from the File menu at the top of your screen).
Revert a package file to single-file format: Choose File > Advanced > Change File Type > Single File. You may need to revert because some web or email services don’t allow you to upload or attach a package file.
See the Apple Support article Save documents as a package or a single file for more information.
Click the spreadsheet name at the top of the Numbers window, then type a new name.
Click anywhere outside the dialog to dismiss it.
With the spreadsheet open, hold down the Option key on your keyboard and choose File > Save As (from the File menu at the top of your screen).
Type a name for the copy, then press Return.
The copy is saved to the same location as the original. You can change where the copy is saved or send the copy to someone.
To save a copy of a spreadsheet in another format (for example, Microsoft Excel, PDF, or Numbers ’09), you make a copy of the spreadsheet in that format. To learn how, see Export to Excel or another file format.