I am just getting started using QGIS 3.6.3. I added a Google satelite imagery using QuickMapServices, which is projected using EPSG:3857 - WGS84/Pseudo-Mercator. Then, while importing some points in a .csv file, I thought that I should choose the same CRS so it lines up with the basemap. But that puts my data on the other side of the world. When I select ESPG:4326 - WGS 84, it lines up whith the basemap.
Are coordinates taken with an handheld GPS device inherently saved in ESPG:4326 and then reprojected when added to a Google EPSG:3857 - WGS84/Pseudo-Mercator basemap?