how can I turn off the automatic save feature?

When I am working on a large spreadsheet I am constantly interrupted by an automatic program save. I cannot find a way to either turn it off or increase the length of time between saves.

In MS-Windows :

Menu Tools → Options → Load/Save → General.

Under the “Save” heading in the General dialog box, either un-check the Auto save/recovery box or increase the time to whatever suits you.

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The problem is that I can’t find that option. On my computer in Calc mode there is no “Save” headiong. Under file there are options for “Save”, “Save as” and “Save all”, but no Auto Save.

@SATOOTOKO It seems you are looking in the wrong place. The answer states from the menu Tools -> Options -> Load/Save -> General and not under File as you seem to be looking. Now it may also be because you did not state your OS (or LO version for that matter - both usually essential) that you may be on a Mac. In that case, as the LO documentation states, Tools -> Options = LibreOffice > Preferences.