How to split a Translation Memory that has over 100.000 translation units in it?

Translation Memories (TMs) saved on the local drive (C:\) are recommended to contain around 100.000 translation units for optimal performance.

If the number of the translation units is greater than 100.000, then the TM can be split, to avoid any distortions or issues while using it.

The split can be done by setting up a filter when you export the contents of the Translation Memory. For example you can set up a filter based on the translation unit creation date (Field: Created on; Operator: Greater than or equal to; Value: date starting from which the units should be exported - e.g. if you select  01.05.2019 12:00:00, all units created on or after the 1st of May 2019, 12 o'clock will be exported)

Steps to follow:

1. Open the translation memory in Trados Studio, in the Translation Memories view
2. Click on Export button from the upper ribbon
3. Click Browse and select the name of the export file and the location where it should be saved
4. Click the Edit... button to set up the filter
5. Click Add button
6. Select from the drop down list Field: "Created on"
7. Select from the drop down list Operator: "Smaller than or equal to"
8. Select the Value from the translation memory *System fields information to select what date should be used to be split
9. Click Finish button 














NOTE: You can also set up multiple criteria (e.g. all units which were created on/after OR last modified on/after 1st of May 2019 should be exported. In order to export the correct translation units, make sure you specify whether both criteria should be met (AND operator), or if units matching one or the other criterion should be exported (OR operator)




You can use the resulting TMX file to create a new, smaller Translation Memory, as described here: How to recreate a Translation Memory to resolve general issues or remove duplicate Translation Units in SDL Trados Studio