Occasional StorageFile errors, needing an 'eraseAll'

Yup, my code doesn't seem to work (even if I try to delete the file before it has errored out). The watch was not on my wrist so it wasn't trying to record any movement.

After dowloading the log I wanted to clear the log,

Bangle.Helper.size("fitclock.log");
869585
=undefined
>require("Storage").getFree();
=3292892
>Bangle.AppLog.clearLog();
=undefined
>require("Storage").getFree();
=3292892
>require("Storage").compact();
=undefined
>require("Storage").getFree();
=3292892

Here's the minified->uploaded->downloaded->beautifi­ed code for clearLog

Bangle.AppLog = {
            currentFile: null,
            lock: !1,
            shardCount: 0,
            currentFileName: "",
            error: !1,
            diskFull: !1,
            init: e => {
                Bangle.AppLog.currentFileName = e;
                try {
                    null != e && "" != e ? (Bangle.AppLog.currentFile = require("Storage").open(e, "a"), console.log("File created: " + e)) : console.error("Log file name not provided")
                } catch (e) {
                    console.log("Failed to create file", e)
                }
            },
            write: e => {
                if (1 != Bangle.AppLog.lock && 1 != Bangle.AppLog.error) try {
                    Bangle.AppLog.currentFile.write(e)
                } catch (e) {
                    console.log(e), Bangle.AppLog.currentFile = null, Bangle.AppLog.error = !0
                }
            },
            clearLog: () => {
                Bangle.AppLog.lock = !0, Bangle.AppLog.currentFile = null, require("Storage").open(Bangle.AppLog.cu­rrentFileName, "w").erase(), require("Storage").compact(), Bangle.AppLog.lock = !1, Bangle.AppLog.error = !1
            },
            beginSync: () => {
                for (var e = require("Storage").open(Bangle.AppLog.cu­rrentFileName, "r"), t = ""; null != t && -1 == t.indexOf("ÿ") && null != (t = e.readLine());) print(t);
                print("\x3c!-- finished sync --\x3e"), e = null
            }
        }

I am not sure if my minification using gulp-terser is mangling code in some way. I'll test with direct require("Storage").open('...','w').erase­() from console tomorrow morning.