His descendants later possessed landholdings mostly in the northeast part of Upper Hungary, including Szeretva (present-day Stretava, Slovakia), which he acquired during his career and later was named after this village.
Ukrainian historian Myroslav Voloshchuk also shared this viewpoint based on a 1233 charter, but he misidentified his person with clergyman File Miskolc.
After Andrew II installed his second son, the minor Coloman the ruler (prince, then king) of Halych (or Galicia) in 1214, File belonged to the entourage of the young monarch.
It is possible File was present when Andrew II and Leszek the White, High Duke of Poland in Szepes (today Spiš, Slovakia) in the autumn of 1214, where they arranged the marriage between Coloman and Salomea, and their alliance against regent Vladislav Kormilchyc.
Representing the Hungarian elite, along with Demetrius Aba and Benedict the Bald, File became one of the outstanding pillars of Coloman's reign in Halych in the subsequent years.
[3] To forge closer ties within the "Hungarian party" in Halych, File married an unidentified daughter of Sudislav, a leading Galician boyar who supported Coloman.
[7] The contemporary Galician–Volhynian Chronicle frequently calls File (Filja) as "gordy" – "proud", "haughty" or "overconfident" –, who constantly disparaged the Galician army.
Mstislav's fiasco encouraged File to join Leszek's campaign against Volhynia, leaving Coloman and Salomea in the newly fortified Church of the Virgin Mary in Halych.
[8] After Béla IV ascended the Hungarian throne in 1235, File retained his influence in the royal court, unlike several other barons, but there are no sources for additional office positions.
[20] Following the withdrawal of the Mongols in 1242, Béla IV was seeking to organize a new defensive system by creating client states to the south and east of Hungary.
Following Rostislav's unsuccessful attack in 1244, Béla supported his son-in-law to invade Halych, ruled by Danylo Romanovich, in the summer of 1245 (earlier historiography incorrectly marked 1249 as the year of the Hungarian campaign).
File is the only known Hungarian military leader, who participated in campaigns against Halych during the reigns of both Andrew II and Béla IV, over a period of twenty-five years.
[24] The Chronicle of the Romanids narrates that File was "captured by the enemies in our former army in Rus' and murdered by diverse tortures and miserably perished".