diff --git a/src/g_gamedata.cpp b/src/g_gamedata.cpp
index e4a2b6b7a..bd2939c75 100644
--- a/src/g_gamedata.cpp
+++ b/src/g_gamedata.cpp
@@ -13,6 +13,7 @@
 #include <algorithm>
 #include <cstdint>
 #include <cstddef>
+#include <exception>
 #include <filesystem>
 
 #include <fmt/format.h>
@@ -286,7 +287,8 @@ void srb2::save_ng_gamedata()
 
 	std::string gamedataname_s {gamedatafilename};
 	fs::path savepath {fmt::format("{}/{}", srb2home, gamedataname_s)};
-	fs::path tmpsavepath {fmt::format("{}/{}.tmp", srb2home, gamedataname_s)};
+	int random_number = rand();
+	fs::path tmpsavepath {fmt::format("{}/{}_{}.tmp", srb2home, gamedataname_s, random_number)};
 
 	json ngdata_json = ng;
 
@@ -294,20 +296,17 @@ void srb2::save_ng_gamedata()
 	{
 		std::string tmpsavepathstring = tmpsavepath.string();
 		srb2::io::FileStream file {tmpsavepathstring, srb2::io::FileStreamMode::kWrite};
-		srb2::io::BufferedOutputStream<srb2::io::FileStream> bos {std::move(file)};
 
 		// The header is necessary to validate during loading.
-		srb2::io::write(static_cast<uint32_t>(GD_VERSION_MAJOR), bos); // major
-		srb2::io::write(static_cast<uint8_t>(GD_VERSION_MINOR), bos); // minor/flags
-		srb2::io::write(static_cast<uint8_t>(gamedata->evercrashed), bos); // dirty (crash recovery)
+		srb2::io::write(static_cast<uint32_t>(GD_VERSION_MAJOR), file); // major
+		srb2::io::write(static_cast<uint8_t>(GD_VERSION_MINOR), file); // minor/flags
+		srb2::io::write(static_cast<uint8_t>(gamedata->evercrashed), file); // dirty (crash recovery)
 
 		std::vector<uint8_t> ubjson = json::to_ubjson(ng);
-		srb2::io::write_exact(bos, tcb::as_bytes(tcb::make_span(ubjson)));
-		bos.flush();
-		file = bos.stream();
+		srb2::io::write_exact(file, tcb::as_bytes(tcb::make_span(ubjson)));
 		file.close();
 	}
-	catch (const srb2::io::FileStreamException& ex)
+	catch (const std::exception& ex)
 	{
 		CONS_Alert(CONS_ERROR, "NG Gamedata save failed: %s\n", ex.what());
 	}
@@ -434,6 +433,13 @@ void srb2::load_ng_gamedata()
 		json parsed = json::from_ubjson(remainder_as_u8);
 		js = parsed.template get<GamedataJson>();
 	}
+	catch (const std::exception& ex)
+	{
+		const char* gdfolder = G_GameDataFolder();
+		const char* what = ex.what();
+		I_Error("Game data is corrupt.\nDelete %s (maybe in %s) and try again.\n\nException: %s", gamedatafilename, gdfolder, what);
+		return;
+	}
 	catch (...)
 	{
 		const char* gdfolder = G_GameDataFolder();
diff --git a/src/k_profiles.cpp b/src/k_profiles.cpp
index eb5371f98..89354bb1c 100644
--- a/src/k_profiles.cpp
+++ b/src/k_profiles.cpp
@@ -12,6 +12,7 @@
 /// \brief implements methods for profiles etc.
 
 #include <algorithm>
+#include <exception>
 
 #include <fmt/format.h>
 
@@ -315,26 +316,28 @@ void PR_SaveProfiles(void)
 	std::vector<uint8_t> ubjson = json::to_ubjson(ng);
 
 	std::string realpath = fmt::format("{}/{}", srb2home, PROFILESFILE);
-	std::string tmppath = fmt::format("{}.tmp", realpath);
+	int random_number = rand();
+	std::string tmppath = fmt::format("{}_{}.tmp", realpath, random_number);
 
 	try
 	{
 		io::FileStream file {tmppath, io::FileStreamMode::kWrite};
-		io::BufferedOutputStream<io::FileStream> bos {std::move(file)};
 
-		io::write(static_cast<uint32_t>(0x52494E47), bos, io::Endian::kBE); // "RING"
-		io::write(static_cast<uint32_t>(0x5052464C), bos, io::Endian::kBE); // "PRFL"
-		io::write(static_cast<uint8_t>(0), bos); // reserved1
-		io::write(static_cast<uint8_t>(0), bos); // reserved2
-		io::write(static_cast<uint8_t>(0), bos); // reserved3
-		io::write(static_cast<uint8_t>(0), bos); // reserved4
-		io::write_exact(bos, tcb::as_bytes(tcb::make_span(ubjson)));
-		bos.flush();
-		file = bos.stream();
+		io::write(static_cast<uint32_t>(0x52494E47), file, io::Endian::kBE); // "RING"
+		io::write(static_cast<uint32_t>(0x5052464C), file, io::Endian::kBE); // "PRFL"
+		io::write(static_cast<uint8_t>(0), file); // reserved1
+		io::write(static_cast<uint8_t>(0), file); // reserved2
+		io::write(static_cast<uint8_t>(0), file); // reserved3
+		io::write(static_cast<uint8_t>(0), file); // reserved4
+		io::write_exact(file, tcb::as_bytes(tcb::make_span(ubjson)));
 		file.close();
 
 		fs::rename(tmppath, realpath);
 	}
+	catch (const std::exception& ex)
+	{
+		I_Error("Couldn't save profiles. Are you out of Disk space / playing in a protected folder?\n\nException: %s", ex.what());
+	}
 	catch (...)
 	{
 		I_Error("Couldn't save profiles. Are you out of Disk space / playing in a protected folder?");
@@ -398,9 +401,14 @@ void PR_LoadProfiles(void)
 		json parsed = json::from_ubjson(remainder_as_u8);
 		js = parsed.template get<ProfilesJson>();
 	}
+	catch (const std::exception& ex)
+	{
+		I_Error("Profiles file is corrupt.\n\nException: %s", ex.what());
+		return;
+	}
 	catch (...)
 	{
-		I_Error("Profiles file is corrupt");
+		I_Error("Profiles file is corrupt.");
 		return;
 	}