In this passage, you will be clear about why you cannot import document and how to solve this problem.
1. When you receive the message Import failed. File extension does not match the format, the local file may have been corrupted and cannot be imported.
2. Drive import function supports files generated by Microsoft Office. If local files are generated by other tools such as WPS, the import may fail due to format mismatch. Try to open the file using Office, save as a local file, and import.
3. If the file that failed to import is .doc/.xls file, try to open the file with Office and save it as .docx/.xlsx file before importing.
4. In the case of poor network and large file, you may receive the message Import failed. If the repeated attempt is still unsuccessful, please contact service via Feishu.