Initially, I created on Acid Music Studio 8. I more recently have upgraded or purchased Acid Pro 8, and most recently Acid Pro 10, which is all up to date. On my Win7 computer, I have Acid Music Studio 8 installed. On the network, I also have newly purchased Windows10 machines, as an upgrade and including the one specifically for my music creation, which has Acid Pro 8 and Acid Pro 10 installed. I mention this stuff, because I'm not sure where my problem is. Sometime recently, while working on a remix for another band, I began to have issues saving files over themselves. I often create a base file and then a "working" file, which I just save, frequently, as I go about creating. I started getting a "There is not enough disk space to save the Acid Project Zip on drive E:\. Please select a different location and try again". If I rename the file, it saves fine. Problem being this bloats and creates unnecessary files, as well as I should be able to save over my file. So I've investigated permissions and ownership and tried all of these. My "music drive" is a Seagate 4TB. Never had a problem. I thought perhaps some Seagate tool issue, based on research. So I copied the files off, which inadvertently had greyed out permissions, and did a hard reformat of the drive and copied the files back on. Didn't work. So I purchased a brand new WD 12TB drive and copied the single project zip file I'm working on currently. Nothing else on the drive. I changed the permissions, took ownership, and still it won't let me save over the file. Same error message. There's 12TB free on the drive! Coincidentally, if I save to C:\ there is no problem but honestly who does that if most computers these days have a limited size hard drive? I don't want to save to C, there's simply not enough room on the system drive to viably use it as a working drive and projects should be able to work from an external drive, right? Again, this wasn't a problem until recently, maybe a few months. I've checked for malware and run an updated avast! I also read articles about antivirus locking files, so hell I even removed Avast on the music computer in an attempt to resolve the issue. So, having done all of this jumping around for ownership and file permissions and having a single file on a brand new drive, my only conclusion is that this is an Acid software issue. I can't think of anything else. Also, this never used to be an issue, like at all, and I've moved portable drives back and forth between computers with zero problems, so I don't understand why this is suddenly an issue? It's definitely disrupting my creativity and driving me absolutely nuts. So, any help would greatly be appreciated. I've been an Acid user for over a decade, but this new issue is really upsetting and making me wonder if I should try a different DAW.