hi,  I'm new here, and I 've been reading around posts about the 137G barrierfor a couple of days, and maybe the solution of my problem is somewhere in this forum, but I did not find it. I downloaded the modified esdi_506.pdr (20/07/2006 version) , partioned a big HD (sold as "300GO") with freefdisk (well, i'm not sure the version of fdisk i used ), so I could have several big parttions. Before using this HD, my partitions (controlled by LetterAssign) were C: and F: on the fist HD, so that i could add 2 HD with their first partitions taking the letters D:and E: without changing the paths to my data (G: is affected by defaut to my DVD-burner, but I don't mind it changing letter in case of new HD) My mobo is recent enough to manage big HDs (48 bits LBA capable). My big HD has 4 fat32  parittions: - first, 7,6GO , "could be" boot partition (selecting the boot drive by bios), seen as D:    - second partition : 149 GO , seen as E: - third partition : 114 GO , seen as G: - last partition: the rest of the available size : 7,6 GO , seen as H: To test, I had to " stuff" the big partitions and see if my data would be corrupted. Si I used  CDCheck to compute a file (drive_F.CRC) from **all_the_data** on my F: partition (~30GO used), and stuffed my E: partition with 4 copies of the content of F: , 4 folders named Copie_F_1 to Copie_F_4, and then I checked the contents using drive_F.CRC. The result of the check is "no error" for the 4 folders, and the total size of the 4 folders is well detected by windows as 117GO :  The same way, one copy of F: has been made to G:., first "directly", and later to a folder "copy_F".  Checking by CDCheck and crc file was OK, and the size reported by windows was  right for the folder:  Though, if I ask windows the used/free size in the partitions, they are wrong :   Partition G: is strange  Is there a solution to this problem ?  I have not used other bits of the "unofficial 98SE service pack" yet, only esdi_506.pdr. did I miss something ?