| English | Welsh |
| data connection file | ffeil cyswllt data (A file that stores information about a connection to a data source, such as an Access database, spreadsheet, or text file, and that facilitates data source administration) |
| data file | ffeil ddata (A file consisting of data in the form of text, numbers, or graphics, as distinct from a program file of commands and instructions) |
| default data file | ffeil data ddiofyn (The .pst data file used as the main delivery location for your e-mail messages) |
| Office data connection file | ffeil cyswllt data Office (A file that stores information about a connection to a data source, such as an Access database, spreadsheet, or text file, and that facilitates data source administration) |