fix minio store gateway err

Signed-off-by: Kartikay <[email protected]>

CHANGELOG.md

@@ -29,6 +29,7 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 - [#6874](https://github.com/thanos-io/thanos/pull/6874) Sidecar: fix labels returned by 'api/v1/series' in presence of conflicting external and inner labels.
 - [#7009](https://github.com/thanos-io/thanos/pull/7009) Rule: Fix spacing error in URL.
 - [#7082](https://github.com/thanos-io/thanos/pull/7082) Stores: fix label values edge case when requesting external label values with matchers
+- [#7114](https://github.com/thanos-io/thanos/pull/7114) Stores: fix file path bug for minio v7.0.61
 
 ### Added
 
@@ -727,11 +728,11 @@ The binaries published with this release are built with Go1.17.8 to avoid [CVE-2
 
 ### Changed
 
--
+- 
 
 ### Removed
 
--
+- 
 
 ## [v0.20.0](https://github.com/thanos-io/thanos/releases/tag/v0.20.0) - 2021.04.28
 

pkg/store/bucket.go

@@ -14,7 +14,6 @@ import (
 	"math"
 	"os"
 	"path"
-	"path/filepath"
 	"sort"
 	"strings"
 	"sync"
@@ -737,7 +736,7 @@ func (s *BucketStore) getBlock(id ulid.ULID) *bucketBlock {
 func (s *BucketStore) addBlock(ctx context.Context, meta *metadata.Meta) (err error) {
 	var dir string
 	if s.dir != "" {
-		dir = filepath.Join(s.dir, meta.ULID.String())
+		dir = path.Join(s.dir, meta.ULID.String())
 	}
 	start := time.Now()