## Preventing data loss

OmegaT is a robust application. However, you should take precautions against data loss when using OmegaT, just as with any other application. When you translate your files, OmegaT stores all your progress in translation memory `project_save.tmx` that resides in the project's `/omegat` subfolder.

OmegaT also backs up the translation memory to `project_save.tmx.YEARMMDDHHNN.bak` in the same subfolder every time when a project is opened or reloaded. `YEAR` is 4-digit year, `MM` is a month, `DD` day of the month, `HH` and `NN` are hours and minutes when the previous translation memory was saved.

If you think you have lost translation data follow this procedure:

1. close the project
2. rename the current `project_save.tmx` file to something you will remember (like `project_save.tmx.temporary` for example)
3. select the backup translation memory that is the most likely to contain the data you are looking for
4. rename it to `project_save.tmx`
5. open the project

To avoid losing important data:

- Make regular copies of the file `/omegat/project_save.tmx` to backup media, such as CD or DVD.
- Until you are familiar with OmegaT, create translated files at regular intervals and check that the translated file contains the latest version of your translation.
- Take particular care when making changes to the files in `/source` whilst in the middle of a project. If the source file is modified after you have begun translating, OmegaT may be unable to find a segment that you have already translated.
- Get started with the aid of these Help texts. Should you run into problems, post a message in the OmegaT user group. Do not hesitate to post in the language you feel the most familiar with.

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