Not Enough Space on Drive: "930GB free" on 250GB SD Card, but Can't Fit >45GB?

Mar 3, 2018
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I can't store more than about 45GB on my new 250GB SD card because when I try, the Computer says "There is not enough space on Local Disk. You need an additional 7.08 GB to copy these files; Local Disk; Space Free: 42.5GB; Total Size: 930GB"
Why is it saying I have 930GB on my 250GB SD card?
Something strange just like this happened before when I tried to put data on my 1TB Seagate portable HDD. It gave me the same message. I was never able to resolve that problem and ended up giving up on the HDD. It's as if this error message is left over from the last issue.
I tried formatting both drives, both a quick format and a slow, and neither solved the issue. I tried switching from exFAT to NTFS and NTFS to exFAT (the SD card wouldn't let me do NTFS). I tried using Command Prompt to do this special kind of format a TH member recommended and it didn't work.
Incidentally my C drive is a Seagate TB Hybrid Drive, but there's nothing wrong with my C or my 500GB D drive as far as I can tell.
I'm running Windows 10 Home 64-bit on a Samsung Series 7 Gamer from 2013 that is in excellent health with no known viruses (I do amature PC repair so I keep my computer clean). 24 GB RAM, Intel i7-3630QM CPU @ 2.40GHz, 1 socket, 4 cores, 8 processors. My GPU is an AMD Radeon HD 7800M series with the latest drivers. Wi-Fi works.
I've tried multiple SD card adapters and I just downloaded the latest RealTech drivers for SD card reading because it wasn't recognizing before.
I also just tested another 64GB SD card I know to be working perfectly. I formatted it in both exFAT and NTFS, and in both cases it now can't hold more than than 42.5GB.

I think I found the source of the problem: I put the SD cards and the portable HDD into another computer (Win 10 Home, 64-bit, i7 Dell Laptop) and they were able to hold more than 42GB. They were able to copy over tons of files and they worked normally. I tried formating the 250GB SD card there and I brought it back to my original computer hoping the format from the Dell would fix the issue, but it didn't, I still can't transfer over more than 42GB. It must be a problem with the computer and not the external drives. Then I went into My PC and found that I only had 42GB left on my C Drive. So that must be it. I can't copy over more GB than I have room left in my C Drive.

I guess my question is why can't I copy over more than what's left on my C Drive if it's all ending up on an external drive? Is it a problem with my computer or is it because I have a hybrid drive or is that how all computers work? At the beginning of this writing, I still hadn't found it out, but as I wrote, I thought of some things I could try and they led me to the solution. I wanted to post this anyway just in case there were others out there dealing with the same issue and because I am curious about why this limitation exists.

Thank you for your time, sorry for being wordy, I just wanted people out there in the same situation to be able to recognize their own situation in this one.
 

RolandJS

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Mar 10, 2017
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"...I tried formating the 250GB SD card there..." If I follow the cool story correctly, you attempted to format the SD in another computer; what was the results of that attempted format on that other computer?
 
Mar 3, 2018
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Sorry for the late reply. It was a SanDisk Ultra Micro SD XC I. In short, I found that if you can't copy over your files to any kind of external drive, it might be because you don't have enough HDD space free on your C Drive to make the transfer because apparently you need enough empty hdd space to copy stuff over, at least, to an extent. I don't know how important it is that it is your C Drive vs. any drive vs. the origin drive and I don't know if there is a threshold where you no longer need more room on your C drive than the file has GB. Formating in the other computer didn't make a difference. It wasn't the SD Card's fault that the files couldn't transfer, as far as I can tell.m It works now, point being. Just delete some programs/files for a while then redownload them once you're done transferring. Does anyone know the answers to these other questions that came up, like just the C drive or all drive, etc.?