I state I am new to Oracle.
I have a bunch of files named .bak they provided me as "backup files". I have got no idea what format they are; I opened them with a text editor and discovered the first word is "TAPE" followed by binary data.
I tried to import them in my Oracle XE 11g local instance (running on Windows 11) using tools like IMP, IMPDP and RMAN but without success.
The IMP output is: IMP-00037: Character set marker unknown
The IMPDP output is: ORA-39001: invalid argument value ORA-39000: bad dump file specification ORA-31619: invalid dump file "D:\PATH\TO\FILE\XXXX.bak"
The RMAN output is: RMAN-07517: Reason: The file header is corrupted
Maybe they used a filesystem platform-specific format?
Anyway, how can I import data from the files? I really appreciate any help you can provide.