Which file for what

Format	Where to import	What it brings
Lenex (.lxf, .lef, .xml)	Add meet, the Events page and Transfers › Import	Sessions, events and age groups; or entries (and results)
Hy-Tek .ev3 (or events .zip)	Add meet and the Events page	Sessions, events and age groups
Hy-Tek .hy3 / .zip	Transfers › Import	Team Manager entries (“Meet Entries”); also results from a Meet Manager file
SDIF (.sd3)	Transfers › Import	Entries
CSV/Excel (.csv, .xlsx)	Transfers › Import	Entries from a spreadsheet
IngáDigital (.xlsx)	Special importers	Entries in the IngáDigital layout; clubs must already be entered in the meet
Placarsoft (.xlsx)	Special importers	Athletes, clubs and registrations only (no events or times)
CBDA Piscina (.fdb)	Special importers, only in the Windows desktop app	A meet from the CBDA system; authorized users only

The spreadsheet columns are in Entries spreadsheet layout (CSV/Excel), and what Lenex is in What Lenex is.