Text truncation shortens words that do not fit in the space available. It is like writing “Alexand…” on a small name tag when the full name will not fit.
A list of file names might show an ellipsis at the end of a long name so every row stays the same height. The full text can still be available on the detail page or through an accessible label.
Do not hide information someone needs to make a choice. If the shortened text could be confusing, let people open it or give the area more room instead.