50 Gb Test File Apr 2026
Creating a full "50 GB test file" is not about writing text content (that would be billions of pages), but about for testing purposes (e.g., network speed, storage limits, or application behavior).
fallocate -l 50G testfile_50GB.bin Python (cross-platform) import os filename = "testfile_50GB.bin" size = 50 * 1024**3 # 50 GB in bytes 50 gb test file
$size = 50GB $file = "C:\testfile_50GB.bin" $stream = [System.IO.File]::OpenWrite($file) $stream.SetLength($size) $stream.Close() Using dd (creates a 50 GB file of zero bytes): Creating a full "50 GB test file" is
with open(filename, "wb") as f: f.seek(size - 1) f.write(b"\0") print(f"Created filename of size os.path.getsize(filename) bytes") This writes a sparse file instantly. For fully populated data, write in chunks. #include <stdio.h> #include <stdlib.h> int main() FILE *f = fopen("testfile_50GB.bin", "wb"); fseek(f, 53687091200L - 1, SEEK_SET); fputc(0, f); fclose(f); return 0; #include <stdio
fsutil file createnew D:\testfile_50GB.bin 53687091200 50 GB = 50 × 1024³ bytes = Or use PowerShell:
