I thought I'd ask here in case anyone has the same issue (or otherwise able to advise). I'm unable to unzip the folders (Niger in this case). Tried IZARC and 7-Zip but both say extract is not supported.
You don't have to extract each .zip.xxx individually. You have to select the first, which will unzip all the .zip.xxx-files.
You could also try to select ALL .zip.xxx-files, and make a right click -> 7-zip -> Extract Here...
Confused as to what does checking the hashtag do? If they don't match they don't match or are you saying you can edit the hashtag to match? I d/l Egypt several times (as you know around 17GB). First zip 001 gives me 12 files (is that correct?). If I use 7-zip and select all 18 zipped files only the first unzips and never starts 002. If I select just the 002 I get "cannot open the file archive". Same with files 2 through 18.
Interesting... ok, so I tried another area, Tunisia. 4 zipped files. I selected just 001 and unzipped. Lots of header errors and reported some 56 bad bgl files. I did get 2572 bgl files and 63,408 agn files. So I imagine the hashtags are ok else it would not unzip?