Here you can find some big sparse files to check that your (or our) system
can handle them correctly.

Currently, you can find the following sizes:

filename                size
1G                      1 GiB
2G                      2 GiB
4G                      4 GiB
8G                      8 GiB
16G                     16 GiB
1T                      1 TiB (1024 GiB)
2T                      2 TiB
4T                      4 TiB
8T                      8 TiB
16T                     16 TiB
32T                     32 TiB
64T                     64 TiB
128T                    128 TiB