FoxPro retains an old Excel limit of 16k records. As a workaround, export to CSV format; you can import into Excel or use a text editor (e.g., Wordpad) to split that file manageable chunks.
Note that on reading into Excel, you have to be careful of column formats. Particularly if you have text columns that are all-numeric (e.g., stock or item numbers), Excel will interpret them as numbers. Ensure that you properly select the column format in the import wizard.