This was another major version upgrade. Yes, I know - I've been working hard with Windows 10 just around the corner, releasing major upgrade after major upgrade
This major version upgrade takes DriveSpace from version 5.1 to 6:
a) New Windows 10 compression support. You now get to enjoy near-DoubleSpace 2 compression savings on Windows 10 with the convenience of DriveSpace (no rebooting, ability to process a PC online while Windows is still running).
b) When you run DriveSpace 6 on Windows 8.1.1 or older, you'll still only be able to enjoy the existing LZNT1/NTFS compression. Running it on Windows 10, you'll get to enjoy brand-new:
XPRESS 4 KB
XPRESS 8 KB
XPRESS 16 KB
compression algorithms! These roughly correspond to the same scale available in DoubleSpace 2 for MaxSpeed
c) DoubleSpace 2 still compresses about 10%-15% better than DriveSpace 6. However, from a convenience perspective, you may just stick to DriveSpace 6 instead of DoubleSpace 2. You will be able to instantly recover space from deleted files, and there'll be no space waste on files that are updated. All you'll need to do is just run DriveSpace 6 occasionally to recompress your updated files. This will surely take a lot less time than recompressing your entire disk, so it is just far more convenient. However, 10%-15% is still significant; so if you just have to maximize your space savings, you may still want to use DoubleSpace 2 on even Windows 10 - say, on a 240 GB SSD, this would save you 24 GB more space.
d) DoubleSpace 2 now recommends you run DriveSpace 6 when it detects you are running on Windows 10. That is, unless your disk was pre-compressed with DoubleSpace 1/2, in which case this recommendation is rescinded; because you may just be wanting to decompress your disk so you can move to the more convenient DriveSpace 6 implementation on Windows 10.
e) DriveSpace 6 does compress slightly better than Windows 10's own compact.exe. For users who wish to be able to realize almost the same space savings as you get with DriveSpace 6, just run this command line on your Windows 10 PC (from an elevated command prompt, of course):
compact.exe /c c:\* /s /a /i /f /exe LZX
DriveSpace 6 is multi-threaded and continues to automatically optimize for the number of CPU cores that are optimal for your system; so you'll still get much faster drive compression and decompression with DriveSpace 6. compact.exe also still fails to compress the majority of disk using LZNT1/NTFS compression; but curiously enough this bug is - almost - fixed entirely for the new compression algorithms introduced with Windows 10.
That's all for describing what's new in this major version upgrade for DriveSpace! Now the good news: If you are current on maintenance, or purchased an upgrade (for the same 70% discounted cost of annual maintenance), your upgrade is free. I have already provided you with the serial number for this upgrade.
I try to aggressively update ZIPmagic, and you can rest assured that if more major version upgrades are released, as long as you're current on maintenance, or purchased an upgraded discount within the year, your major version upgrade will always be free.
Unlike other archiving tools, ZIPmagic is always about aggressive innovation