I suspect you are chasing the wrong problem, and don't need any task killer or messing about with sdcard! If you are using a bloated app like Firefox 4 it will overfill your RAM memory (not mentioned so far - I think 512mb). See http://www.tested.com/news/everything-y ... roid/2084/
The high memory usage is going to be an issue for phones with less RAM. Even those with 512MB will see the browser closing in the background far too much. Mozilla needs to work on memory usage with the Gecko engine.
I guess there is a new Firefox 7 needing less RAM, but it didn't even occur to me to try such a thing that isn't built on a foundation of smaller devices (archos gen8 only had 256 RAM which many complain about but I find fine).
Now my archives has 57MB of memory used and 191 MB free... does it sound good?
That sounds extremely empty - you can jam this pretty close to full except a few dozen mb for cache expansion. I can't believe app space is the problem and I think you needn't take anymore steps to clear it out. You need that flash! Maybe you never needed to delete anything there or move anything to sd.
What exactly was your warning message about? Surely it was about RAM, which is the normal working memory. Archos gen 8 came with an app called system monitor which would tell you how much you have left. We have to be careful about terminology, because multiple confusing names are used. This is what a task killer would clear out, although what I used for a while was "auto memory manager" app - it doesn't have to be a manual process but ongoing and auto.
Maybe we can find a way to measure remaining RAM, but I think you can start by either trying Firefox 7, or else getting rid of firefox or other big memory users. The term RAM is like SDCARD, which describes the physical holder of memory, but programs probably will refer to an android name for the function of that memory. I don't know what they would call it - maybe can find it in a Gingerbread manual online.
One of the more common complaints I've heard about Firefox over the last few years has been about its gluttonous use of system RAM. Firefox 7, released today, addresses this issue head on, with a MemShrink project that reduces memory use by 20 to 50 percent, according to Mozilla, the non-profit organization that develops Firefox. This results in both faster performance and a lower likelihood of crashing.
Above is from http://www.pcmag.com/article2/0,2817,23 ... QEWBEnS12r
, but I wouldn't assume even that version is safe for arnova. Learn to love Dolphin - the gesture part can be a big time saver too. I wouldn't even install an auto memory manager; Gingerbread probably handles it fine if you just nuke the desktop bloatware.
P.S. a confusing thing about "sdcard" is that most file browsers combine directory sdcard (on nand) and sdcard/sdcard (on a card). If you use a linux style file browser they will show the real directory structure. I think they use symbolic links or something to make them appear the same.