Error in .local(.Object, ...) : Unable to create dataset

rasterOptions(tmpdir="E:\rTemp")

myRaster
class       : RasterLayer
dimensions  : 67200, 172800, 11612160000  (nrow, ncol, ncell)
resolution  : 0.002083333, 0.002083333  (x, y)
extent      : -180, 179.9999, -56.00081, 83.99917  (xmin, xmax, ymin, ymax)
coord. ref. : +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0
data source : E:rTempr_tmp_2017-09-25_010935_1648_64229.grd
names       : layer
values      : 1, 4  (min, max)

sessionInfo()
R version 3.4.1 (2017-06-30)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

Matrix products: default

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] rasterVis_0.41      latticeExtra_0.6-28 RColorBrewer_1.1-2  lattice_0.20-35     dplyr_0.7.2         rgdal_1.2-8         raster_2.5-8
[8] sp_1.2-5

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.12      zoo_1.8-0         viridisLite_0.2.0 assertthat_0.2.0  grid_3.4.1        R6_2.2.2          magrittr_1.5      rlang_0.1.1
 [9] hexbin_1.27.1     bindrcpp_0.2      tools_3.4.1       glue_1.1.1        parallel_3.4.1    compiler_3.4.1    pkgconfig_2.0.1   bindr_0.1
[17] tibble_1.3.3