[AT&T Samsung Galaxy Note II] hikaricloud:
Okay, so this is going to be a bit long. Sorry.

I updated to this ROM a little over a month ago (v37 at the time). Since then I've had a number of weird issues crop up, but there are some serious ones that I'm thoroughly stumped on.

First, signal. I have this problem with my signal going kaput in areas that most definitely have service. Sometimes it'll say the whole "emergency calls only" thing, sometimes just "no service". Normally flicking the radio fixes it, however lately it's been a bit more frequent and worse, I've had to reboot my phone many times. Earlier today as a prime example, showed no service and didn't work even after multiple toggles on and off (including airplane mode)...only after I rebooted did it pick up the 4 bars of LTE service I had in the same exact spot. Since then I have updated to v50, so I'm unsure if this is still an issue, however I did want to mention it just in case.

Second, freezing/locking up. This occurs randomly. There are times where the entire screen will lock up/freeze while doing random things. Sometimes I'll lock the screen, then attempt to unlock and the screen will stay black. Sometimes it'll stay that way for over 5 minutes, most times 1-2 minutes. This has been happening since I did a clean install of v37, though it has been more prevalent lately. After updating to v50, so far it happens just as frequently if not more frequently. On average between this and the signal problem, I'm rebooting/popping the battery anywhere from 3-5 times a day.

Thirdly AND MOST IMPORTANT.

I have a Sandisk 64gb Class 10 MicroSD using exFAT. This has worked fine the entire time I've had it dating back to stock Samsung and into CleanROM ACE 5.0 (4.1.2), however apparently since using this ROM there have been some weird happenings I've only found out about today. It all started when I had trouble moving files to it in ES (wanted the updated ROM on the external instead of the internal just in case). Ended up pulling the card and plugging it into my computer only to find out it was acting as if it was read only for the entire card (attempted with multiple readers as well just to be sure). No deleting, no adding. After doing some extensive googling, tried a number of different things to get it to work (most notably all iterations of chkdsk), to which I kept getting errors about a corrupted file and it would not complete (even with /f option).

At this point I backed up my data with no issues, so I could attempt to format. The only file that was showing as corrupted was the partially transferred file from earlier. But when I went to format, it failed every time. I used SDFormatter and Windows, SDFormatter told me the card was write-protected and needed to flip the switch (that doesn't exist on MicroSD cards...) and windows just flat out failed.

After that, attempted to change attributes of folders/files manually (unchecking read-only), only to be met with this "dirty" error for all files:

At a loss, I just put the card back into my phone. Attempted to format from settings, just unmounted then remounted 10 seconds later with all data intact still. Opened up ES to see if it allowed me to delete/modify contents...and it did. Weird. I deleted the corrupt file from earlier, unmounted the card properly and plugged it back into my computer...the file was still there. Back into the phone, file still there.

At this point I've done just about everything I (and Google) could possibly think of. I've found threads specifically about exFAT 64gb cards having this problem, as well as a very odd thread about how it seemed like it was caused by CM (someone else with an unofficial CM11 build). I've tried Unlocker and TestDisk, all chkdsk options...I'm at a loss. If anyone could shed some insight on this I would MUCH appreciate it. I can't imagine the card is actually broken, I was able to backup files easily and fairly quick with no read errors, but I'm really not sure anymore.

Sorry for the mega-huge post. I've been beating my head against the wall on this for hours now.