Using AdvSplit tool, work using cmd to join parts?
function JoinFile(const FileName, OutFile: String): Boolean;
var
Param: String;
ResultCode: Integer;
begin
ForceDirectories(ExtractFileDir(OutFile));
if FileExists(OutFile) then
Param := 'COPY /B "' + OutFile + '" + "' + FileName + '" "' + OutFile + '"'
else
Param := 'COPY /B "' + FileName + '" "' + OutFile + '"';
Result := Exec(ExpandConstant('{cmd}'), '/C "' + Param + '"', '',SW_HIDE, ewWaitUntilTerminated, ResultCode);
end;
Here is a example using sfk.exe (Swiss File Knife). Split individual parts on especify size...
https://mega.nz/#!cAQRjQBJ!gT6Owe5qE...cSgTbzp9tC-EV8