This is based on the logs archiving retention period and will decide the number of days that SDLTMS stores records of uploaded files to SDLTMS for live jobs.
The name ITD uploads takes its name from the ITD files that has since been replaced by XLIFF as the standard bilingual file type for SDLTMS.
A translator downloads a bilingual file and works within it, at the point of upload the file (if successful) will import into SDLTMS. A record of the file and associated logs will be stored on the network.
This information is typically only used for debugging should there be any problems with the file at a later stage and a backup is needed. The files are only accessible to the network administrators.