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엑셀 파일 안 열림? ‘파일 형식 또는 파일 확장명 이 잘못되어’ 해결 가이드

엑셀 파일 안 열림? ‘파일 형식 또는 파일 확장명 이 잘못되어’ 해결 가이드

엑셀 파일을 열 때 ‘파일 형식 또는 파일 확장명 이 잘못되어’ 오류가 발생하나요? 이 글에서는 엑셀 확장자 변경부터 xlsx 파일 안 열림, xlsm 파일 열기 문제까지 단계별 해결 방법을 정리했습니다. 손상된 엑셀 파일을 안전하게 복구하는 방법을 확인해보세요.

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